Finding the Fourth Proportional to 22,931.51, 34,400.69 and 8,139.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.51 : 34,400.69 = 8,139.19 : x
2. Step 2: Convert to fraction form
   22,931.51/34,400.69 = 8,139.19/x
3. Step 3: Cross multiply
   22,931.51x = 34,400.69 × 8,139.19
4. Step 4: Simplify right side
   22,931.51x = 279,993,752.04
5. Step 5: Solve for x
   x = 279,993,752.04/22,931.51
6. Step 6: Final answer
   x = 12,210.00