Finding the Fourth Proportional to 10,815.59, 14,926.43 and 7,945.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.59 : 14,926.43 = 7,945.43 : x
2. Step 2: Convert to fraction form
   10,815.59/14,926.43 = 7,945.43/x
3. Step 3: Cross multiply
   10,815.59x = 14,926.43 × 7,945.43
4. Step 4: Simplify right side
   10,815.59x = 118,596,849.95
5. Step 5: Solve for x
   x = 118,596,849.95/10,815.59
6. Step 6: Final answer
   x = 10,965.36