Finding the Fourth Proportional to 12,931.60, 19,382.24 and 5,991.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.60 : 19,382.24 = 5,991.52 : x
2. Step 2: Convert to fraction form
   12,931.60/19,382.24 = 5,991.52/x
3. Step 3: Cross multiply
   12,931.60x = 19,382.24 × 5,991.52
4. Step 4: Simplify right side
   12,931.60x = 116,129,078.60
5. Step 5: Solve for x
   x = 116,129,078.60/12,931.60
6. Step 6: Final answer
   x = 8,980.26