Finding the Fourth Proportional to 129,052.55, 178,086.47 and 71,695.58

Step by Step Solution

1. Step 1: Write the proportion equation
   129,052.55 : 178,086.47 = 71,695.58 : x
2. Step 2: Convert to fraction form
   129,052.55/178,086.47 = 71,695.58/x
3. Step 3: Cross multiply
   129,052.55x = 178,086.47 × 71,695.58
4. Step 4: Simplify right side
   129,052.55x = 12,768,011,507.89
5. Step 5: Solve for x
   x = 12,768,011,507.89/129,052.55
6. Step 6: Final answer
   x = 98,936.53