Finding the Fourth Proportional to 9,902.97, 13,666.02 and 5,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.97 : 13,666.02 = 5,426.72 : x
2. Step 2: Convert to fraction form
   9,902.97/13,666.02 = 5,426.72/x
3. Step 3: Cross multiply
   9,902.97x = 13,666.02 × 5,426.72
4. Step 4: Simplify right side
   9,902.97x = 74,161,595.72
5. Step 5: Solve for x
   x = 74,161,595.72/9,902.97
6. Step 6: Final answer
   x = 7,488.82