Finding the Fourth Proportional to 31,135.76, 42,965.56 and 17,705.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,135.76 : 42,965.56 = 17,705.12 : x
2. Step 2: Convert to fraction form
   31,135.76/42,965.56 = 17,705.12/x
3. Step 3: Cross multiply
   31,135.76x = 42,965.56 × 17,705.12
4. Step 4: Simplify right side
   31,135.76x = 760,710,395.67
5. Step 5: Solve for x
   x = 760,710,395.67/31,135.76
6. Step 6: Final answer
   x = 24,432.05