Finding the Fourth Proportional to 31,018.95, 42,792.30 and 20,944.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.95 : 42,792.30 = 20,944.17 : x
2. Step 2: Convert to fraction form
   31,018.95/42,792.30 = 20,944.17/x
3. Step 3: Cross multiply
   31,018.95x = 42,792.30 × 20,944.17
4. Step 4: Simplify right side
   31,018.95x = 896,249,205.89
5. Step 5: Solve for x
   x = 896,249,205.89/31,018.95
6. Step 6: Final answer
   x = 28,893.60