Finding the Fourth Proportional to 8,931.39, 12,322.29 and 5,788.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.39 : 12,322.29 = 5,788.20 : x
2. Step 2: Convert to fraction form
   8,931.39/12,322.29 = 5,788.20/x
3. Step 3: Cross multiply
   8,931.39x = 12,322.29 × 5,788.20
4. Step 4: Simplify right side
   8,931.39x = 71,323,878.98
5. Step 5: Solve for x
   x = 71,323,878.98/8,931.39
6. Step 6: Final answer
   x = 7,985.75