Finding the Fourth Proportional to 86,071.72, 129,144.06 and 79,182.76

Step by Step Solution

1. Step 1: Write the proportion equation
   86,071.72 : 129,144.06 = 79,182.76 : x
2. Step 2: Convert to fraction form
   86,071.72/129,144.06 = 79,182.76/x
3. Step 3: Cross multiply
   86,071.72x = 129,144.06 × 79,182.76
4. Step 4: Simplify right side
   86,071.72x = 10,225,983,108.41
5. Step 5: Solve for x
   x = 10,225,983,108.41/86,071.72
6. Step 6: Final answer
   x = 118,807.70