Finding the Fourth Proportional to 13,312.18, 18,373.94 and 8,280.26

Step by Step Solution

1. Step 1: Write the proportion equation
   13,312.18 : 18,373.94 = 8,280.26 : x
2. Step 2: Convert to fraction form
   13,312.18/18,373.94 = 8,280.26/x
3. Step 3: Cross multiply
   13,312.18x = 18,373.94 × 8,280.26
4. Step 4: Simplify right side
   13,312.18x = 152,141,000.42
5. Step 5: Solve for x
   x = 152,141,000.42/13,312.18
6. Step 6: Final answer
   x = 11,428.71