Finding the Fourth Proportional to 9,921.34, 13,691.01 and 5,445.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.34 : 13,691.01 = 5,445.10 : x
2. Step 2: Convert to fraction form
   9,921.34/13,691.01 = 5,445.10/x
3. Step 3: Cross multiply
   9,921.34x = 13,691.01 × 5,445.10
4. Step 4: Simplify right side
   9,921.34x = 74,548,918.55
5. Step 5: Solve for x
   x = 74,548,918.55/9,921.34
6. Step 6: Final answer
   x = 7,514.00