Finding the Fourth Proportional to 8,972.99, 12,382.72 and 5,196.35

Step by Step Solution

1. Step 1: Write the proportion equation
   8,972.99 : 12,382.72 = 5,196.35 : x
2. Step 2: Convert to fraction form
   8,972.99/12,382.72 = 5,196.35/x
3. Step 3: Cross multiply
   8,972.99x = 12,382.72 × 5,196.35
4. Step 4: Simplify right side
   8,972.99x = 64,344,947.07
5. Step 5: Solve for x
   x = 64,344,947.07/8,972.99
6. Step 6: Final answer
   x = 7,170.96