Finding the Fourth Proportional to 87,643.49, 131,501.48 and 42,028.07

Step by Step Solution

1. Step 1: Write the proportion equation
   87,643.49 : 131,501.48 = 42,028.07 : x
2. Step 2: Convert to fraction form
   87,643.49/131,501.48 = 42,028.07/x
3. Step 3: Cross multiply
   87,643.49x = 131,501.48 × 42,028.07
4. Step 4: Simplify right side
   87,643.49x = 5,526,752,538.90
5. Step 5: Solve for x
   x = 5,526,752,538.90/87,643.49
6. Step 6: Final answer
   x = 63,059.48