Finding the Fourth Proportional to 156,540.83, 234,390.53 and 128,795.69

Step by Step Solution

1. Step 1: Write the proportion equation
   156,540.83 : 234,390.53 = 128,795.69 : x
2. Step 2: Convert to fraction form
   156,540.83/234,390.53 = 128,795.69/x
3. Step 3: Cross multiply
   156,540.83x = 234,390.53 × 128,795.69
4. Step 4: Simplify right side
   156,540.83x = 30,188,490,948.78
5. Step 5: Solve for x
   x = 30,188,490,948.78/156,540.83
6. Step 6: Final answer
   x = 192,847.40