Finding the Fourth Proportional to 9,898.84, 13,660.56 and 5,423.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.84 : 13,660.56 = 5,423.02 : x
2. Step 2: Convert to fraction form
   9,898.84/13,660.56 = 5,423.02/x
3. Step 3: Cross multiply
   9,898.84x = 13,660.56 × 5,423.02
4. Step 4: Simplify right side
   9,898.84x = 74,081,490.09
5. Step 5: Solve for x
   x = 74,081,490.09/9,898.84
6. Step 6: Final answer
   x = 7,483.86