Finding the Fourth Proportional to 132,005.69, 197,977.89 and 78,712.55

Step by Step Solution

1. Step 1: Write the proportion equation
   132,005.69 : 197,977.89 = 78,712.55 : x
2. Step 2: Convert to fraction form
   132,005.69/197,977.89 = 78,712.55/x
3. Step 3: Cross multiply
   132,005.69x = 197,977.89 × 78,712.55
4. Step 4: Simplify right side
   132,005.69x = 15,583,344,565.52
5. Step 5: Solve for x
   x = 15,583,344,565.52/132,005.69
6. Step 6: Final answer
   x = 118,050.55