Finding the Fourth Proportional to 86,860.17, 130,248.61 and 42,434.91

Step by Step Solution

1. Step 1: Write the proportion equation
   86,860.17 : 130,248.61 = 42,434.91 : x
2. Step 2: Convert to fraction form
   86,860.17/130,248.61 = 42,434.91/x
3. Step 3: Cross multiply
   86,860.17x = 130,248.61 × 42,434.91
4. Step 4: Simplify right side
   86,860.17x = 5,527,087,936.89
5. Step 5: Solve for x
   x = 5,527,087,936.89/86,860.17
6. Step 6: Final answer
   x = 63,632.02