Finding the Fourth Proportional to 8,938.51, 12,342.98 and 5,587.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,938.51 : 12,342.98 = 5,587.05 : x
2. Step 2: Convert to fraction form
   8,938.51/12,342.98 = 5,587.05/x
3. Step 3: Cross multiply
   8,938.51x = 12,342.98 × 5,587.05
4. Step 4: Simplify right side
   8,938.51x = 68,960,846.41
5. Step 5: Solve for x
   x = 68,960,846.41/8,938.51
6. Step 6: Final answer
   x = 7,715.03