Finding the Fourth Proportional to 87,109.80, 130,689.52 and 42,749.88

Step by Step Solution

1. Step 1: Write the proportion equation
   87,109.80 : 130,689.52 = 42,749.88 : x
2. Step 2: Convert to fraction form
   87,109.80/130,689.52 = 42,749.88/x
3. Step 3: Cross multiply
   87,109.80x = 130,689.52 × 42,749.88
4. Step 4: Simplify right side
   87,109.80x = 5,586,961,297.26
5. Step 5: Solve for x
   x = 5,586,961,297.26/87,109.80
6. Step 6: Final answer
   x = 64,137.00