Finding the Fourth Proportional to 31,151.10, 42,988.56 and 17,724.99

Step by Step Solution

1. Step 1: Write the proportion equation
   31,151.10 : 42,988.56 = 17,724.99 : x
2. Step 2: Convert to fraction form
   31,151.10/42,988.56 = 17,724.99/x
3. Step 3: Cross multiply
   31,151.10x = 42,988.56 × 17,724.99
4. Step 4: Simplify right side
   31,151.10x = 761,971,796.11
5. Step 5: Solve for x
   x = 761,971,796.11/31,151.10
6. Step 6: Final answer
   x = 24,460.51