Finding the Fourth Proportional to 57,999.32, 86,985.12 and 42,388.24

Step by Step Solution

1. Step 1: Write the proportion equation
   57,999.32 : 86,985.12 = 42,388.24 : x
2. Step 2: Convert to fraction form
   57,999.32/86,985.12 = 42,388.24/x
3. Step 3: Cross multiply
   57,999.32x = 86,985.12 × 42,388.24
4. Step 4: Simplify right side
   57,999.32x = 3,687,145,645.28
5. Step 5: Solve for x
   x = 3,687,145,645.28/57,999.32
6. Step 6: Final answer
   x = 63,572.23