Finding the Fourth Proportional to 9,976.38, 13,667.70 and 9,602.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,976.38 : 13,667.70 = 9,602.70 : x
2. Step 2: Convert to fraction form
   9,976.38/13,667.70 = 9,602.70/x
3. Step 3: Cross multiply
   9,976.38x = 13,667.70 × 9,602.70
4. Step 4: Simplify right side
   9,976.38x = 131,246,822.79
5. Step 5: Solve for x
   x = 131,246,822.79/9,976.38
6. Step 6: Final answer
   x = 13,155.76