Finding the Fourth Proportional to 161,978.99, 243,042.32 and 83,148.62

Step by Step Solution

1. Step 1: Write the proportion equation
   161,978.99 : 243,042.32 = 83,148.62 : x
2. Step 2: Convert to fraction form
   161,978.99/243,042.32 = 83,148.62/x
3. Step 3: Cross multiply
   161,978.99x = 243,042.32 × 83,148.62
4. Step 4: Simplify right side
   161,978.99x = 20,208,633,509.60
5. Step 5: Solve for x
   x = 20,208,633,509.60/161,978.99
6. Step 6: Final answer
   x = 124,760.83