Finding the Fourth Proportional to 1,123,188,758.58, 1,549,988,994.55 and 621,401,133.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,188,758.58 : 1,549,988,994.55 = 621,401,133.48 : x
2. Step 2: Convert to fraction form
   1,123,188,758.58/1,549,988,994.55 = 621,401,133.48/x
3. Step 3: Cross multiply
   1,123,188,758.58x = 1,549,988,994.55 × 621,401,133.48
4. Step 4: Simplify right side
   1,123,188,758.58x = 963,164,918,097,436,544
5. Step 5: Solve for x
   x = 963,164,918,097,436,544/1,123,188,758.58
6. Step 6: Final answer
   x = 857,527,206.12