Finding the Fourth Proportional to 105,059.52, 157,654.88 and 42,730

Step by Step Solution

1. Step 1: Write the proportion equation
   105,059.52 : 157,654.88 = 42,730 : x
2. Step 2: Convert to fraction form
   105,059.52/157,654.88 = 42,730/x
3. Step 3: Cross multiply
   105,059.52x = 157,654.88 × 42,730
4. Step 4: Simplify right side
   105,059.52x = 6,736,593,022.40
5. Step 5: Solve for x
   x = 6,736,593,022.40/105,059.52
6. Step 6: Final answer
   x = 64,121.68