Finding the Fourth Proportional to 81,880.58, 122,877.27 and 28,572.86

Step by Step Solution

1. Step 1: Write the proportion equation
   81,880.58 : 122,877.27 = 28,572.86 : x
2. Step 2: Convert to fraction form
   81,880.58/122,877.27 = 28,572.86/x
3. Step 3: Cross multiply
   81,880.58x = 122,877.27 × 28,572.86
4. Step 4: Simplify right side
   81,880.58x = 3,510,955,032.89
5. Step 5: Solve for x
   x = 3,510,955,032.89/81,880.58
6. Step 6: Final answer
   x = 42,878.97