Finding the Fourth Proportional to 87,821.82, 131,746.50 and 28,643.83

Step by Step Solution

1. Step 1: Write the proportion equation
   87,821.82 : 131,746.50 = 28,643.83 : x
2. Step 2: Convert to fraction form
   87,821.82/131,746.50 = 28,643.83/x
3. Step 3: Cross multiply
   87,821.82x = 131,746.50 × 28,643.83
4. Step 4: Simplify right side
   87,821.82x = 3,773,724,019.73
5. Step 5: Solve for x
   x = 3,773,724,019.73/87,821.82
6. Step 6: Final answer
   x = 42,970.23