Finding the Fourth Proportional to 9,819.90, 13,551.32 and 5,343.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.90 : 13,551.32 = 5,343.60 : x
2. Step 2: Convert to fraction form
   9,819.90/13,551.32 = 5,343.60/x
3. Step 3: Cross multiply
   9,819.90x = 13,551.32 × 5,343.60
4. Step 4: Simplify right side
   9,819.90x = 72,412,833.55
5. Step 5: Solve for x
   x = 72,412,833.55/9,819.90
6. Step 6: Final answer
   x = 7,374.09