Finding the Fourth Proportional to 72,987.30, 100,722.56 and 42,766.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,987.30 : 100,722.56 = 42,766.61 : x
2. Step 2: Convert to fraction form
   72,987.30/100,722.56 = 42,766.61/x
3. Step 3: Cross multiply
   72,987.30x = 100,722.56 × 42,766.61
4. Step 4: Simplify right side
   72,987.30x = 4,307,561,976.08
5. Step 5: Solve for x
   x = 4,307,561,976.08/72,987.30
6. Step 6: Final answer
   x = 59,017.96