Finding the Fourth Proportional to 9,410.61, 12,984.56 and 5,430.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.61 : 12,984.56 = 5,430.87 : x
2. Step 2: Convert to fraction form
   9,410.61/12,984.56 = 5,430.87/x
3. Step 3: Cross multiply
   9,410.61x = 12,984.56 × 5,430.87
4. Step 4: Simplify right side
   9,410.61x = 70,517,430.21
5. Step 5: Solve for x
   x = 70,517,430.21/9,410.61
6. Step 6: Final answer
   x = 7,493.40