Finding the Fourth Proportional to 31,099.67, 42,904.02 and 19,763.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,099.67 : 42,904.02 = 19,763.09 : x
2. Step 2: Convert to fraction form
   31,099.67/42,904.02 = 19,763.09/x
3. Step 3: Cross multiply
   31,099.67x = 42,904.02 × 19,763.09
4. Step 4: Simplify right side
   31,099.67x = 847,916,008.62
5. Step 5: Solve for x
   x = 847,916,008.62/31,099.67
6. Step 6: Final answer
   x = 27,264.47