Finding the Fourth Proportional to 81,209.40, 112,103.52 and 49,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   81,209.40 : 112,103.52 = 49,388.52 : x
2. Step 2: Convert to fraction form
   81,209.40/112,103.52 = 49,388.52/x
3. Step 3: Cross multiply
   81,209.40x = 112,103.52 × 49,388.52
4. Step 4: Simplify right side
   81,209.40x = 5,536,626,939.59
5. Step 5: Solve for x
   x = 5,536,626,939.59/81,209.40
6. Step 6: Final answer
   x = 68,177.17