Finding the Fourth Proportional to 103,662.15, 155,304.59 and 72,005.32

Step by Step Solution

1. Step 1: Write the proportion equation
   103,662.15 : 155,304.59 = 72,005.32 : x
2. Step 2: Convert to fraction form
   103,662.15/155,304.59 = 72,005.32/x
3. Step 3: Cross multiply
   103,662.15x = 155,304.59 × 72,005.32
4. Step 4: Simplify right side
   103,662.15x = 11,182,756,700.42
5. Step 5: Solve for x
   x = 11,182,756,700.42/103,662.15
6. Step 6: Final answer
   x = 107,876.95