Finding the Fourth Proportional to 81,172.47, 121,758.71 and 49,158.00

Step by Step Solution

1. Step 1: Write the proportion equation
   81,172.47 : 121,758.71 = 49,158.00 : x
2. Step 2: Convert to fraction form
   81,172.47/121,758.71 = 49,158.00/x
3. Step 3: Cross multiply
   81,172.47x = 121,758.71 × 49,158.00
4. Step 4: Simplify right side
   81,172.47x = 5,985,414,057.39
5. Step 5: Solve for x
   x = 5,985,414,057.39/81,172.47
6. Step 6: Final answer
   x = 73,736.99