Finding the Fourth Proportional to 103,660.15, 155,301.59 and 72,003.32

Step by Step Solution

1. Step 1: Write the proportion equation
   103,660.15 : 155,301.59 = 72,003.32 : x
2. Step 2: Convert to fraction form
   103,660.15/155,301.59 = 72,003.32/x
3. Step 3: Cross multiply
   103,660.15x = 155,301.59 × 72,003.32
4. Step 4: Simplify right side
   103,660.15x = 11,182,230,081.28
5. Step 5: Solve for x
   x = 11,182,230,081.28/103,660.15
6. Step 6: Final answer
   x = 107,873.95