Finding the Fourth Proportional to 31,487.78, 43,453.14 and 17,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,487.78 : 43,453.14 = 17,340.50 : x
2. Step 2: Convert to fraction form
   31,487.78/43,453.14 = 17,340.50/x
3. Step 3: Cross multiply
   31,487.78x = 43,453.14 × 17,340.50
4. Step 4: Simplify right side
   31,487.78x = 753,499,174.17
5. Step 5: Solve for x
   x = 753,499,174.17/31,487.78
6. Step 6: Final answer
   x = 23,929.89