Finding the Fourth Proportional to 72,791.47, 109,122.22 and 28,407.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,791.47 : 109,122.22 = 28,407.88 : x
2. Step 2: Convert to fraction form
   72,791.47/109,122.22 = 28,407.88/x
3. Step 3: Cross multiply
   72,791.47x = 109,122.22 × 28,407.88
4. Step 4: Simplify right side
   72,791.47x = 3,099,930,931.09
5. Step 5: Solve for x
   x = 3,099,930,931.09/72,791.47
6. Step 6: Final answer
   x = 42,586.46