Finding the Fourth Proportional to 8,972.86, 12,383.70 and 5,436.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,972.86 : 12,383.70 = 5,436.16 : x
2. Step 2: Convert to fraction form
   8,972.86/12,383.70 = 5,436.16/x
3. Step 3: Cross multiply
   8,972.86x = 12,383.70 × 5,436.16
4. Step 4: Simplify right side
   8,972.86x = 67,319,774.59
5. Step 5: Solve for x
   x = 67,319,774.59/8,972.86
6. Step 6: Final answer
   x = 7,502.60