Finding the Fourth Proportional to 155,430.57, 233,145.90 and 43,139.10

Step by Step Solution

1. Step 1: Write the proportion equation
   155,430.57 : 233,145.90 = 43,139.10 : x
2. Step 2: Convert to fraction form
   155,430.57/233,145.90 = 43,139.10/x
3. Step 3: Cross multiply
   155,430.57x = 233,145.90 × 43,139.10
4. Step 4: Simplify right side
   155,430.57x = 10,057,704,294.69
5. Step 5: Solve for x
   x = 10,057,704,294.69/155,430.57
6. Step 6: Final answer
   x = 64,708.66