Finding the Fourth Proportional to 13,071.30, 18,039.93 and 7,766.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.30 : 18,039.93 = 7,766.13 : x
2. Step 2: Convert to fraction form
   13,071.30/18,039.93 = 7,766.13/x
3. Step 3: Cross multiply
   13,071.30x = 18,039.93 × 7,766.13
4. Step 4: Simplify right side
   13,071.30x = 140,100,441.57
5. Step 5: Solve for x
   x = 140,100,441.57/13,071.30
6. Step 6: Final answer
   x = 10,718.17