Finding the Fourth Proportional to 9,360.62, 12,918.18 and 5,112.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.62 : 12,918.18 = 5,112.07 : x
2. Step 2: Convert to fraction form
   9,360.62/12,918.18 = 5,112.07/x
3. Step 3: Cross multiply
   9,360.62x = 12,918.18 × 5,112.07
4. Step 4: Simplify right side
   9,360.62x = 66,038,647.17
5. Step 5: Solve for x
   x = 66,038,647.17/9,360.62
6. Step 6: Final answer
   x = 7,054.95