Finding the Fourth Proportional to 161,978.49, 243,041.57 and 83,148.12

Step by Step Solution

1. Step 1: Write the proportion equation
   161,978.49 : 243,041.57 = 83,148.12 : x
2. Step 2: Convert to fraction form
   161,978.49/243,041.57 = 83,148.12/x
3. Step 3: Cross multiply
   161,978.49x = 243,041.57 × 83,148.12
4. Step 4: Simplify right side
   161,978.49x = 20,208,449,627.35
5. Step 5: Solve for x
   x = 20,208,449,627.35/161,978.49
6. Step 6: Final answer
   x = 124,760.08