Finding the Fourth Proportional to 9,345.42, 12,889.38 and 5,988.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,345.42 : 12,889.38 = 5,988.55 : x
2. Step 2: Convert to fraction form
   9,345.42/12,889.38 = 5,988.55/x
3. Step 3: Cross multiply
   9,345.42x = 12,889.38 × 5,988.55
4. Step 4: Simplify right side
   9,345.42x = 77,188,696.60
5. Step 5: Solve for x
   x = 77,188,696.60/9,345.42
6. Step 6: Final answer
   x = 8,259.52