Finding the Fourth Proportional to 103,659.46, 155,300.56 and 72,002.64

Step by Step Solution

1. Step 1: Write the proportion equation
   103,659.46 : 155,300.56 = 72,002.64 : x
2. Step 2: Convert to fraction form
   103,659.46/155,300.56 = 72,002.64/x
3. Step 3: Cross multiply
   103,659.46x = 155,300.56 × 72,002.64
4. Step 4: Simplify right side
   103,659.46x = 11,182,050,313.48
5. Step 5: Solve for x
   x = 11,182,050,313.48/103,659.46
6. Step 6: Final answer
   x = 107,872.94