Finding the Fourth Proportional to 78,084.56, 117,131.98 and 31,331.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,084.56 : 117,131.98 = 31,331.36 : x
2. Step 2: Convert to fraction form
   78,084.56/117,131.98 = 31,331.36/x
3. Step 3: Cross multiply
   78,084.56x = 117,131.98 × 31,331.36
4. Step 4: Simplify right side
   78,084.56x = 3,669,904,232.89
5. Step 5: Solve for x
   x = 3,669,904,232.89/78,084.56
6. Step 6: Final answer
   x = 46,999.10