Finding the Fourth Proportional to 9,402.56, 12,975.54 and 5,210.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.56 : 12,975.54 = 5,210.81 : x
2. Step 2: Convert to fraction form
   9,402.56/12,975.54 = 5,210.81/x
3. Step 3: Cross multiply
   9,402.56x = 12,975.54 × 5,210.81
4. Step 4: Simplify right side
   9,402.56x = 67,613,073.59
5. Step 5: Solve for x
   x = 67,613,073.59/9,402.56
6. Step 6: Final answer
   x = 7,190.92