Finding the Fourth Proportional to 87,989.83, 131,984.98 and 21,429.83

Step by Step Solution

1. Step 1: Write the proportion equation
   87,989.83 : 131,984.98 = 21,429.83 : x
2. Step 2: Convert to fraction form
   87,989.83/131,984.98 = 21,429.83/x
3. Step 3: Cross multiply
   87,989.83x = 131,984.98 × 21,429.83
4. Step 4: Simplify right side
   87,989.83x = 2,828,415,960.34
5. Step 5: Solve for x
   x = 2,828,415,960.34/87,989.83
6. Step 6: Final answer
   x = 32,144.81