Finding the Fourth Proportional to 9,412.98, 12,986.37 and 5,432.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,412.98 : 12,986.37 = 5,432.64 : x
2. Step 2: Convert to fraction form
   9,412.98/12,986.37 = 5,432.64/x
3. Step 3: Cross multiply
   9,412.98x = 12,986.37 × 5,432.64
4. Step 4: Simplify right side
   9,412.98x = 70,550,273.12
5. Step 5: Solve for x
   x = 70,550,273.12/9,412.98
6. Step 6: Final answer
   x = 7,495.00