Finding the Fourth Proportional to 9,189.47, 12,684.35 and 5,412.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.47 : 12,684.35 = 5,412.35 : x
2. Step 2: Convert to fraction form
   9,189.47/12,684.35 = 5,412.35/x
3. Step 3: Cross multiply
   9,189.47x = 12,684.35 × 5,412.35
4. Step 4: Simplify right side
   9,189.47x = 68,652,141.72
5. Step 5: Solve for x
   x = 68,652,141.72/9,189.47
6. Step 6: Final answer
   x = 7,470.74