Finding the Fourth Proportional to 9,089.70, 12,543.98 and 5,554.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,089.70 : 12,543.98 = 5,554.86 : x
2. Step 2: Convert to fraction form
   9,089.70/12,543.98 = 5,554.86/x
3. Step 3: Cross multiply
   9,089.70x = 12,543.98 × 5,554.86
4. Step 4: Simplify right side
   9,089.70x = 69,680,052.74
5. Step 5: Solve for x
   x = 69,680,052.74/9,089.70
6. Step 6: Final answer
   x = 7,665.83