Finding the Fourth Proportional to 9,670.56, 13,345.35 and 5,478.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,670.56 : 13,345.35 = 5,478.81 : x
2. Step 2: Convert to fraction form
   9,670.56/13,345.35 = 5,478.81/x
3. Step 3: Cross multiply
   9,670.56x = 13,345.35 × 5,478.81
4. Step 4: Simplify right side
   9,670.56x = 73,116,637.03
5. Step 5: Solve for x
   x = 73,116,637.03/9,670.56
6. Step 6: Final answer
   x = 7,560.74