Finding the Fourth Proportional to 149,131.47, 205,803.88 and 81,148.79

Step by Step Solution

1. Step 1: Write the proportion equation
   149,131.47 : 205,803.88 = 81,148.79 : x
2. Step 2: Convert to fraction form
   149,131.47/205,803.88 = 81,148.79/x
3. Step 3: Cross multiply
   149,131.47x = 205,803.88 × 81,148.79
4. Step 4: Simplify right side
   149,131.47x = 16,700,735,839.31
5. Step 5: Solve for x
   x = 16,700,735,839.31/149,131.47
6. Step 6: Final answer
   x = 111,986.66