Finding the Fourth Proportional to 78,488.55, 117,730.17 and 34,115.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,488.55 : 117,730.17 = 34,115.31 : x
2. Step 2: Convert to fraction form
   78,488.55/117,730.17 = 34,115.31/x
3. Step 3: Cross multiply
   78,488.55x = 117,730.17 × 34,115.31
4. Step 4: Simplify right side
   78,488.55x = 4,016,401,245.90
5. Step 5: Solve for x
   x = 4,016,401,245.90/78,488.55
6. Step 6: Final answer
   x = 51,171.81