Finding the Fourth Proportional to 86,689.28, 119,622.30 and 59,488.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,689.28 : 119,622.30 = 59,488.72 : x
2. Step 2: Convert to fraction form
   86,689.28/119,622.30 = 59,488.72/x
3. Step 3: Cross multiply
   86,689.28x = 119,622.30 × 59,488.72
4. Step 4: Simplify right side
   86,689.28x = 7,116,177,510.46
5. Step 5: Solve for x
   x = 7,116,177,510.46/86,689.28
6. Step 6: Final answer
   x = 82,088.32