Finding the Fourth Proportional to 9,670.49, 13,345.04 and 5,421.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,670.49 : 13,345.04 = 5,421.74 : x
2. Step 2: Convert to fraction form
   9,670.49/13,345.04 = 5,421.74/x
3. Step 3: Cross multiply
   9,670.49x = 13,345.04 × 5,421.74
4. Step 4: Simplify right side
   9,670.49x = 72,353,243.34
5. Step 5: Solve for x
   x = 72,353,243.34/9,670.49
6. Step 6: Final answer
   x = 7,481.86