Finding the Fourth Proportional to 31,533.42, 43,522.43 and 18,113.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,533.42 : 43,522.43 = 18,113.88 : x
2. Step 2: Convert to fraction form
   31,533.42/43,522.43 = 18,113.88/x
3. Step 3: Cross multiply
   31,533.42x = 43,522.43 × 18,113.88
4. Step 4: Simplify right side
   31,533.42x = 788,359,983.76
5. Step 5: Solve for x
   x = 788,359,983.76/31,533.42
6. Step 6: Final answer
   x = 25,000.78