Finding the Fourth Proportional to 9,390.98, 12,959.57 and 5,412.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.98 : 12,959.57 = 5,412.13 : x
2. Step 2: Convert to fraction form
   9,390.98/12,959.57 = 5,412.13/x
3. Step 3: Cross multiply
   9,390.98x = 12,959.57 × 5,412.13
4. Step 4: Simplify right side
   9,390.98x = 70,138,858.72
5. Step 5: Solve for x
   x = 70,138,858.72/9,390.98
6. Step 6: Final answer
   x = 7,468.75