Finding the Fourth Proportional to 105,087.68, 157,514.88 and 42,724.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,087.68 : 157,514.88 = 42,724.16 : x
2. Step 2: Convert to fraction form
   105,087.68/157,514.88 = 42,724.16/x
3. Step 3: Cross multiply
   105,087.68x = 157,514.88 × 42,724.16
4. Step 4: Simplify right side
   105,087.68x = 6,729,690,935.50
5. Step 5: Solve for x
   x = 6,729,690,935.50/105,087.68
6. Step 6: Final answer
   x = 64,038.82