Finding the Fourth Proportional to 8,641.71, 12,962.52 and 5,719.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.71 : 12,962.52 = 5,719.32 : x
2. Step 2: Convert to fraction form
   8,641.71/12,962.52 = 5,719.32/x
3. Step 3: Cross multiply
   8,641.71x = 12,962.52 × 5,719.32
4. Step 4: Simplify right side
   8,641.71x = 74,136,799.89
5. Step 5: Solve for x
   x = 74,136,799.89/8,641.71
6. Step 6: Final answer
   x = 8,578.95