Finding the Fourth Proportional to 13,385.21, 18,475.85 and 7,797.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.21 : 18,475.85 = 7,797.29 : x
2. Step 2: Convert to fraction form
   13,385.21/18,475.85 = 7,797.29/x
3. Step 3: Cross multiply
   13,385.21x = 18,475.85 × 7,797.29
4. Step 4: Simplify right side
   13,385.21x = 144,061,521.46
5. Step 5: Solve for x
   x = 144,061,521.46/13,385.21
6. Step 6: Final answer
   x = 10,762.74