Finding the Fourth Proportional to 9,402.51, 12,975.90 and 5,210.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.51 : 12,975.90 = 5,210.76 : x
2. Step 2: Convert to fraction form
   9,402.51/12,975.90 = 5,210.76/x
3. Step 3: Cross multiply
   9,402.51x = 12,975.90 × 5,210.76
4. Step 4: Simplify right side
   9,402.51x = 67,614,300.68
5. Step 5: Solve for x
   x = 67,614,300.68/9,402.51
6. Step 6: Final answer
   x = 7,191.09