Finding the Fourth Proportional to 86,287.82, 129,188.41 and 45,669.32

Step by Step Solution

1. Step 1: Write the proportion equation
   86,287.82 : 129,188.41 = 45,669.32 : x
2. Step 2: Convert to fraction form
   86,287.82/129,188.41 = 45,669.32/x
3. Step 3: Cross multiply
   86,287.82x = 129,188.41 × 45,669.32
4. Step 4: Simplify right side
   86,287.82x = 5,899,947,045.38
5. Step 5: Solve for x
   x = 5,899,947,045.38/86,287.82
6. Step 6: Final answer
   x = 68,375.20