Finding the Fourth Proportional to 31,000, 42,780.96 and 17,752

Step by Step Solution

1. Step 1: Write the proportion equation
   31,000 : 42,780.96 = 17,752 : x
2. Step 2: Convert to fraction form
   31,000/42,780.96 = 17,752/x
3. Step 3: Cross multiply
   31,000x = 42,780.96 × 17,752
4. Step 4: Simplify right side
   31,000x = 759,447,601.92
5. Step 5: Solve for x
   x = 759,447,601.92/31,000
6. Step 6: Final answer
   x = 24,498.31