Finding the Fourth Proportional to 215,061.54, 296,801.55 and 129,023.75

Step by Step Solution

1. Step 1: Write the proportion equation
   215,061.54 : 296,801.55 = 129,023.75 : x
2. Step 2: Convert to fraction form
   215,061.54/296,801.55 = 129,023.75/x
3. Step 3: Cross multiply
   215,061.54x = 296,801.55 × 129,023.75
4. Step 4: Simplify right side
   215,061.54x = 38,294,447,502.80
5. Step 5: Solve for x
   x = 38,294,447,502.80/215,061.54
6. Step 6: Final answer
   x = 178,062.74