Finding the Fourth Proportional to 1,272,980.88, 1,908,398.88 and 552,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,980.88 : 1,908,398.88 = 552,780.72 : x
2. Step 2: Convert to fraction form
   1,272,980.88/1,908,398.88 = 552,780.72/x
3. Step 3: Cross multiply
   1,272,980.88x = 1,908,398.88 × 552,780.72
4. Step 4: Simplify right side
   1,272,980.88x = 1,054,926,106,933.59
5. Step 5: Solve for x
   x = 1,054,926,106,933.59/1,272,980.88
6. Step 6: Final answer
   x = 828,705.38