Finding the Fourth Proportional to 1,111,454.14, 1,533,800.69 and 621,423.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111,454.14 : 1,533,800.69 = 621,423.56 : x
2. Step 2: Convert to fraction form
   1,111,454.14/1,533,800.69 = 621,423.56/x
3. Step 3: Cross multiply
   1,111,454.14x = 1,533,800.69 × 621,423.56
4. Step 4: Simplify right side
   1,111,454.14x = 953,139,888,167.98
5. Step 5: Solve for x
   x = 953,139,888,167.98/1,111,454.14
6. Step 6: Final answer
   x = 857,561.15