Finding the Fourth Proportional to 42,807.22, 59,069.94 and 28,981.43

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807.22 : 59,069.94 = 28,981.43 : x
2. Step 2: Convert to fraction form
   42,807.22/59,069.94 = 28,981.43/x
3. Step 3: Cross multiply
   42,807.22x = 59,069.94 × 28,981.43
4. Step 4: Simplify right side
   42,807.22x = 1,711,931,311.72
5. Step 5: Solve for x
   x = 1,711,931,311.72/42,807.22
6. Step 6: Final answer
   x = 39,991.65