Finding the Fourth Proportional to 31,153, 42,990.75 and 17,724.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153 : 42,990.75 = 17,724.22 : x
2. Step 2: Convert to fraction form
   31,153/42,990.75 = 17,724.22/x
3. Step 3: Cross multiply
   31,153x = 42,990.75 × 17,724.22
4. Step 4: Simplify right side
   31,153x = 761,977,510.97
5. Step 5: Solve for x
   x = 761,977,510.97/31,153
6. Step 6: Final answer
   x = 24,459.20