Finding the Fourth Proportional to 9,189.61, 12,681.28 and 5,412.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.61 : 12,681.28 = 5,412.93 : x
2. Step 2: Convert to fraction form
   9,189.61/12,681.28 = 5,412.93/x
3. Step 3: Cross multiply
   9,189.61x = 12,681.28 × 5,412.93
4. Step 4: Simplify right side
   9,189.61x = 68,642,790.48
5. Step 5: Solve for x
   x = 68,642,790.48/9,189.61
6. Step 6: Final answer
   x = 7,469.61