Finding the Fourth Proportional to 86,860.15, 130,248.61 and 42,434.89

Step by Step Solution

1. Step 1: Write the proportion equation
   86,860.15 : 130,248.61 = 42,434.89 : x
2. Step 2: Convert to fraction form
   86,860.15/130,248.61 = 42,434.89/x
3. Step 3: Cross multiply
   86,860.15x = 130,248.61 × 42,434.89
4. Step 4: Simplify right side
   86,860.15x = 5,527,085,006.29
5. Step 5: Solve for x
   x = 5,527,085,006.29/86,860.15
6. Step 6: Final answer
   x = 63,632.00