Finding the Fourth Proportional to 129,146.76, 178,225.83 and 71,002.79

Step by Step Solution

1. Step 1: Write the proportion equation
   129,146.76 : 178,225.83 = 71,002.79 : x
2. Step 2: Convert to fraction form
   129,146.76/178,225.83 = 71,002.79/x
3. Step 3: Cross multiply
   129,146.76x = 178,225.83 × 71,002.79
4. Step 4: Simplify right side
   129,146.76x = 12,654,531,180.07
5. Step 5: Solve for x
   x = 12,654,531,180.07/129,146.76
6. Step 6: Final answer
   x = 97,985.67