Finding the Fourth Proportional to 13,275.84, 18,326.88 and 7,685.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,275.84 : 18,326.88 = 7,685.76 : x
2. Step 2: Convert to fraction form
   13,275.84/18,326.88 = 7,685.76/x
3. Step 3: Cross multiply
   13,275.84x = 18,326.88 × 7,685.76
4. Step 4: Simplify right side
   13,275.84x = 140,856,001.23
5. Step 5: Solve for x
   x = 140,856,001.23/13,275.84
6. Step 6: Final answer
   x = 10,609.95