Finding the Fourth Proportional to 9,902.04, 13,664.78 and 5,425.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.04 : 13,664.78 = 5,425.78 : x
2. Step 2: Convert to fraction form
   9,902.04/13,664.78 = 5,425.78/x
3. Step 3: Cross multiply
   9,902.04x = 13,664.78 × 5,425.78
4. Step 4: Simplify right side
   9,902.04x = 74,142,090.03
5. Step 5: Solve for x
   x = 74,142,090.03/9,902.04
6. Step 6: Final answer
   x = 7,487.56