Finding the Fourth Proportional to 31,140.78, 42,975.67 and 17,533.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,140.78 : 42,975.67 = 17,533.50 : x
2. Step 2: Convert to fraction form
   31,140.78/42,975.67 = 17,533.50/x
3. Step 3: Cross multiply
   31,140.78x = 42,975.67 × 17,533.50
4. Step 4: Simplify right side
   31,140.78x = 753,514,088.24
5. Step 5: Solve for x
   x = 753,514,088.24/31,140.78
6. Step 6: Final answer
   x = 24,197.02