Finding the Fourth Proportional to 108,521.10, 152,136.90 and 108,521.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,521.10 : 152,136.90 = 108,521.10 : x
2. Step 2: Convert to fraction form
   108,521.10/152,136.90 = 108,521.10/x
3. Step 3: Cross multiply
   108,521.10x = 152,136.90 × 108,521.10
4. Step 4: Simplify right side
   108,521.10x = 16,510,063,738.59
5. Step 5: Solve for x
   x = 16,510,063,738.59/108,521.10
6. Step 6: Final answer
   x = 152,136.90