Finding the Fourth Proportional to 13,200.98, 18,215.62 and 7,893.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.98 : 18,215.62 = 7,893.86 : x
2. Step 2: Convert to fraction form
   13,200.98/18,215.62 = 7,893.86/x
3. Step 3: Cross multiply
   13,200.98x = 18,215.62 × 7,893.86
4. Step 4: Simplify right side
   13,200.98x = 143,791,443.28
5. Step 5: Solve for x
   x = 143,791,443.28/13,200.98
6. Step 6: Final answer
   x = 10,892.49