Finding the Fourth Proportional to 12,665.95, 17,479.68 and 7,631.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.95 : 17,479.68 = 7,631.76 : x
2. Step 2: Convert to fraction form
   12,665.95/17,479.68 = 7,631.76/x
3. Step 3: Cross multiply
   12,665.95x = 17,479.68 × 7,631.76
4. Step 4: Simplify right side
   12,665.95x = 133,400,722.64
5. Step 5: Solve for x
   x = 133,400,722.64/12,665.95
6. Step 6: Final answer
   x = 10,532.23