Finding the Fourth Proportional to 78,127.68, 117,234.15 and 33,142.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,127.68 : 117,234.15 = 33,142.05 : x
2. Step 2: Convert to fraction form
   78,127.68/117,234.15 = 33,142.05/x
3. Step 3: Cross multiply
   78,127.68x = 117,234.15 × 33,142.05
4. Step 4: Simplify right side
   78,127.68x = 3,885,380,061.01
5. Step 5: Solve for x
   x = 3,885,380,061.01/78,127.68
6. Step 6: Final answer
   x = 49,731.16