Finding the Fourth Proportional to 108,386.69, 149,613.75 and 81,606.87

Step by Step Solution

1. Step 1: Write the proportion equation
   108,386.69 : 149,613.75 = 81,606.87 : x
2. Step 2: Convert to fraction form
   108,386.69/149,613.75 = 81,606.87/x
3. Step 3: Cross multiply
   108,386.69x = 149,613.75 × 81,606.87
4. Step 4: Simplify right side
   108,386.69x = 12,209,509,846.46
5. Step 5: Solve for x
   x = 12,209,509,846.46/108,386.69
6. Step 6: Final answer
   x = 112,647.69