Finding the Fourth Proportional to 118,146.24, 177,131.76 and 71,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,146.24 : 177,131.76 = 71,388.12 : x
2. Step 2: Convert to fraction form
   118,146.24/177,131.76 = 71,388.12/x
3. Step 3: Cross multiply
   118,146.24x = 177,131.76 × 71,388.12
4. Step 4: Simplify right side
   118,146.24x = 12,645,103,338.69
5. Step 5: Solve for x
   x = 12,645,103,338.69/118,146.24
6. Step 6: Final answer
   x = 107,029.25