Finding the Fourth Proportional to 78,105.64, 117,225.42 and 31,392.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.64 : 117,225.42 = 31,392.04 : x
2. Step 2: Convert to fraction form
   78,105.64/117,225.42 = 31,392.04/x
3. Step 3: Cross multiply
   78,105.64x = 117,225.42 × 31,392.04
4. Step 4: Simplify right side
   78,105.64x = 3,679,945,073.66
5. Step 5: Solve for x
   x = 3,679,945,073.66/78,105.64
6. Step 6: Final answer
   x = 47,114.97