Finding the Fourth Proportional to 86,622.72, 129,856.32 and 71,926.08

Step by Step Solution

1. Step 1: Write the proportion equation
   86,622.72 : 129,856.32 = 71,926.08 : x
2. Step 2: Convert to fraction form
   86,622.72/129,856.32 = 71,926.08/x
3. Step 3: Cross multiply
   86,622.72x = 129,856.32 × 71,926.08
4. Step 4: Simplify right side
   86,622.72x = 9,340,056,060.83
5. Step 5: Solve for x
   x = 9,340,056,060.83/86,622.72
6. Step 6: Final answer
   x = 107,824.55