Finding the Fourth Proportional to 9,146.56, 12,620.64 and 5,370.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.56 : 12,620.64 = 5,370.16 : x
2. Step 2: Convert to fraction form
   9,146.56/12,620.64 = 5,370.16/x
3. Step 3: Cross multiply
   9,146.56x = 12,620.64 × 5,370.16
4. Step 4: Simplify right side
   9,146.56x = 67,774,856.10
5. Step 5: Solve for x
   x = 67,774,856.10/9,146.56
6. Step 6: Final answer
   x = 7,409.87