Finding the Fourth Proportional to 13,106.85, 18,088.98 and 7,801.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,106.85 : 18,088.98 = 7,801.62 : x
2. Step 2: Convert to fraction form
   13,106.85/18,088.98 = 7,801.62/x
3. Step 3: Cross multiply
   13,106.85x = 18,088.98 × 7,801.62
4. Step 4: Simplify right side
   13,106.85x = 141,123,348.15
5. Step 5: Solve for x
   x = 141,123,348.15/13,106.85
6. Step 6: Final answer
   x = 10,767.14