Finding the Fourth Proportional to 72,454.72, 99,987.51 and 40,623.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,454.72 : 99,987.51 = 40,623.61 : x
2. Step 2: Convert to fraction form
   72,454.72/99,987.51 = 40,623.61/x
3. Step 3: Cross multiply
   72,454.72x = 99,987.51 × 40,623.61
4. Step 4: Simplify right side
   72,454.72x = 4,061,853,611.11
5. Step 5: Solve for x
   x = 4,061,853,611.11/72,454.72
6. Step 6: Final answer
   x = 56,060.58