Finding the Fourth Proportional to 129,304.01, 178,441.71 and 71,947.91

Step by Step Solution

1. Step 1: Write the proportion equation
   129,304.01 : 178,441.71 = 71,947.91 : x
2. Step 2: Convert to fraction form
   129,304.01/178,441.71 = 71,947.91/x
3. Step 3: Cross multiply
   129,304.01x = 178,441.71 × 71,947.91
4. Step 4: Simplify right side
   129,304.01x = 12,838,508,091.33
5. Step 5: Solve for x
   x = 12,838,508,091.33/129,304.01
6. Step 6: Final answer
   x = 99,289.33