Finding the Fourth Proportional to 1,061,623.55, 1,592,425.60 and 430,387.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,623.55 : 1,592,425.60 = 430,387.31 : x
2. Step 2: Convert to fraction form
   1,061,623.55/1,592,425.60 = 430,387.31/x
3. Step 3: Cross multiply
   1,061,623.55x = 1,592,425.60 × 430,387.31
4. Step 4: Simplify right side
   1,061,623.55x = 685,359,761,321.04
5. Step 5: Solve for x
   x = 685,359,761,321.04/1,061,623.55
6. Step 6: Final answer
   x = 645,577.02