Finding the Fourth Proportional to 87,089.42, 130,692.27 and 31,685.42

Step by Step Solution

1. Step 1: Write the proportion equation
   87,089.42 : 130,692.27 = 31,685.42 : x
2. Step 2: Convert to fraction form
   87,089.42/130,692.27 = 31,685.42/x
3. Step 3: Cross multiply
   87,089.42x = 130,692.27 × 31,685.42
4. Step 4: Simplify right side
   87,089.42x = 4,141,039,465.70
5. Step 5: Solve for x
   x = 4,141,039,465.70/87,089.42
6. Step 6: Final answer
   x = 47,549.28