Finding the Fourth Proportional to 108,684.71, 149,915.89 and 78,514.36

Step by Step Solution

1. Step 1: Write the proportion equation
   108,684.71 : 149,915.89 = 78,514.36 : x
2. Step 2: Convert to fraction form
   108,684.71/149,915.89 = 78,514.36/x
3. Step 3: Cross multiply
   108,684.71x = 149,915.89 × 78,514.36
4. Step 4: Simplify right side
   108,684.71x = 11,770,550,502.99
5. Step 5: Solve for x
   x = 11,770,550,502.99/108,684.71
6. Step 6: Final answer
   x = 108,299.97