Finding the Fourth Proportional to 22,878.66, 31,572.57 and 12,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,878.66 : 31,572.57 = 12,807.12 : x
2. Step 2: Convert to fraction form
   22,878.66/31,572.57 = 12,807.12/x
3. Step 3: Cross multiply
   22,878.66x = 31,572.57 × 12,807.12
4. Step 4: Simplify right side
   22,878.66x = 404,353,830.83
5. Step 5: Solve for x
   x = 404,353,830.83/22,878.66
6. Step 6: Final answer
   x = 17,673.84