Finding the Fourth Proportional to 31,101, 42,920.10 and 17,670.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,101 : 42,920.10 = 17,670.12 : x
2. Step 2: Convert to fraction form
   31,101/42,920.10 = 17,670.12/x
3. Step 3: Cross multiply
   31,101x = 42,920.10 × 17,670.12
4. Step 4: Simplify right side
   31,101x = 758,403,317.41
5. Step 5: Solve for x
   x = 758,403,317.41/31,101
6. Step 6: Final answer
   x = 24,385.17