Finding the Fourth Proportional to 85,308.86, 117,688.14 and 49,478.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,308.86 : 117,688.14 = 49,478.12 : x
2. Step 2: Convert to fraction form
   85,308.86/117,688.14 = 49,478.12/x
3. Step 3: Cross multiply
   85,308.86x = 117,688.14 × 49,478.12
4. Step 4: Simplify right side
   85,308.86x = 5,822,987,913.50
5. Step 5: Solve for x
   x = 5,822,987,913.50/85,308.86
6. Step 6: Final answer
   x = 68,257.72