Finding the Fourth Proportional to 81,870.56, 122,862.23 and 28,562.84

Step by Step Solution

1. Step 1: Write the proportion equation
   81,870.56 : 122,862.23 = 28,562.84 : x
2. Step 2: Convert to fraction form
   81,870.56/122,862.23 = 28,562.84/x
3. Step 3: Cross multiply
   81,870.56x = 122,862.23 × 28,562.84
4. Step 4: Simplify right side
   81,870.56x = 3,509,294,217.53
5. Step 5: Solve for x
   x = 3,509,294,217.53/81,870.56
6. Step 6: Final answer
   x = 42,863.93