Finding the Fourth Proportional to 9,902.10, 13,664.88 and 5,426.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.10 : 13,664.88 = 5,426.13 : x
2. Step 2: Convert to fraction form
   9,902.10/13,664.88 = 5,426.13/x
3. Step 3: Cross multiply
   9,902.10x = 13,664.88 × 5,426.13
4. Step 4: Simplify right side
   9,902.10x = 74,147,415.31
5. Step 5: Solve for x
   x = 74,147,415.31/9,902.10
6. Step 6: Final answer
   x = 7,488.05