Finding the Fourth Proportional to 35,411.88, 48,861.72 and 21,986.40

Step by Step Solution

1. Step 1: Write the proportion equation
   35,411.88 : 48,861.72 = 21,986.40 : x
2. Step 2: Convert to fraction form
   35,411.88/48,861.72 = 21,986.40/x
3. Step 3: Cross multiply
   35,411.88x = 48,861.72 × 21,986.40
4. Step 4: Simplify right side
   35,411.88x = 1,074,293,320.61
5. Step 5: Solve for x
   x = 1,074,293,320.61/35,411.88
6. Step 6: Final answer
   x = 30,337.09