Finding the Fourth Proportional to 126,429.87, 174,507.99 and 78,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   126,429.87 : 174,507.99 = 78,654.72 : x
2. Step 2: Convert to fraction form
   126,429.87/174,507.99 = 78,654.72/x
3. Step 3: Cross multiply
   126,429.87x = 174,507.99 × 78,654.72
4. Step 4: Simplify right side
   126,429.87x = 13,725,877,091.21
5. Step 5: Solve for x
   x = 13,725,877,091.21/126,429.87
6. Step 6: Final answer
   x = 108,565.14