Finding the Fourth Proportional to 9,416.10, 12,990.62 and 5,435.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,416.10 : 12,990.62 = 5,435.76 : x
2. Step 2: Convert to fraction form
   9,416.10/12,990.62 = 5,435.76/x
3. Step 3: Cross multiply
   9,416.10x = 12,990.62 × 5,435.76
4. Step 4: Simplify right side
   9,416.10x = 70,613,865.39
5. Step 5: Solve for x
   x = 70,613,865.39/9,416.10
6. Step 6: Final answer
   x = 7,499.27