Finding the Fourth Proportional to 12,787.61, 19,172.48 and 5,667.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,787.61 : 19,172.48 = 5,667.98 : x
2. Step 2: Convert to fraction form
   12,787.61/19,172.48 = 5,667.98/x
3. Step 3: Cross multiply
   12,787.61x = 19,172.48 × 5,667.98
4. Step 4: Simplify right side
   12,787.61x = 108,669,108.99
5. Step 5: Solve for x
   x = 108,669,108.99/12,787.61
6. Step 6: Final answer
   x = 8,498.00