Finding the Fourth Proportional to 9,670.71, 13,345.61 and 5,478.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,670.71 : 13,345.61 = 5,478.96 : x
2. Step 2: Convert to fraction form
   9,670.71/13,345.61 = 5,478.96/x
3. Step 3: Cross multiply
   9,670.71x = 13,345.61 × 5,478.96
4. Step 4: Simplify right side
   9,670.71x = 73,120,035.97
5. Step 5: Solve for x
   x = 73,120,035.97/9,670.71
6. Step 6: Final answer
   x = 7,560.98