Finding the Fourth Proportional to 78,087.69, 117,153.42 and 31,373.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,087.69 : 117,153.42 = 31,373.37 : x
2. Step 2: Convert to fraction form
   78,087.69/117,153.42 = 31,373.37/x
3. Step 3: Cross multiply
   78,087.69x = 117,153.42 × 31,373.37
4. Step 4: Simplify right side
   78,087.69x = 3,675,497,592.43
5. Step 5: Solve for x
   x = 3,675,497,592.43/78,087.69
6. Step 6: Final answer
   x = 47,068.85