Finding the Fourth Proportional to 103,514.42, 155,225.50 and 72,126.18

Step by Step Solution

1. Step 1: Write the proportion equation
   103,514.42 : 155,225.50 = 72,126.18 : x
2. Step 2: Convert to fraction form
   103,514.42/155,225.50 = 72,126.18/x
3. Step 3: Cross multiply
   103,514.42x = 155,225.50 × 72,126.18
4. Step 4: Simplify right side
   103,514.42x = 11,195,822,173.27
5. Step 5: Solve for x
   x = 11,195,822,173.27/103,514.42
6. Step 6: Final answer
   x = 108,157.12