Finding the Fourth Proportional to 31,142.61, 42,977.25 and 16,995.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.61 : 42,977.25 = 16,995.15 : x
2. Step 2: Convert to fraction form
   31,142.61/42,977.25 = 16,995.15/x
3. Step 3: Cross multiply
   31,142.61x = 42,977.25 × 16,995.15
4. Step 4: Simplify right side
   31,142.61x = 730,404,810.34
5. Step 5: Solve for x
   x = 730,404,810.34/31,142.61
6. Step 6: Final answer
   x = 23,453.55