Finding the Fourth Proportional to 256,133.30, 359,111.50 and 256,133.30

Step by Step Solution

1. Step 1: Write the proportion equation
   256,133.30 : 359,111.50 = 256,133.30 : x
2. Step 2: Convert to fraction form
   256,133.30/359,111.50 = 256,133.30/x
3. Step 3: Cross multiply
   256,133.30x = 359,111.50 × 256,133.30
4. Step 4: Simplify right side
   256,133.30x = 91,980,413,562.95
5. Step 5: Solve for x
   x = 91,980,413,562.95/256,133.30
6. Step 6: Final answer
   x = 359,111.50