Finding the Fourth Proportional to 9,412.08, 12,987.72 and 5,434.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,412.08 : 12,987.72 = 5,434.46 : x
2. Step 2: Convert to fraction form
   9,412.08/12,987.72 = 5,434.46/x
3. Step 3: Cross multiply
   9,412.08x = 12,987.72 × 5,434.46
4. Step 4: Simplify right side
   9,412.08x = 70,581,244.83
5. Step 5: Solve for x
   x = 70,581,244.83/9,412.08
6. Step 6: Final answer
   x = 7,499.01