Finding the Fourth Proportional to 12,990.52, 17,926.68 and 7,953.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990.52 : 17,926.68 = 7,953.94 : x
2. Step 2: Convert to fraction form
   12,990.52/17,926.68 = 7,953.94/x
3. Step 3: Cross multiply
   12,990.52x = 17,926.68 × 7,953.94
4. Step 4: Simplify right side
   12,990.52x = 142,587,737.12
5. Step 5: Solve for x
   x = 142,587,737.12/12,990.52
6. Step 6: Final answer
   x = 10,976.29