Finding the Fourth Proportional to 12,488.76, 18,731.52 and 5,919.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.76 : 18,731.52 = 5,919.12 : x
2. Step 2: Convert to fraction form
   12,488.76/18,731.52 = 5,919.12/x
3. Step 3: Cross multiply
   12,488.76x = 18,731.52 × 5,919.12
4. Step 4: Simplify right side
   12,488.76x = 110,874,114.66
5. Step 5: Solve for x
   x = 110,874,114.66/12,488.76
6. Step 6: Final answer
   x = 8,877.91