Finding the Third Proportional to 62,688 and 90,576

Step by Step Solution

1. Step 1: Write the proportion equation
   62,688 : 90,576 = 90,576 : x
2. Step 2: Convert to fraction form
   62,688/90,576 = 90,576/x
3. Step 3: Cross multiply
   62,688x = 90,576 × 90,576
4. Step 4: Simplify right side
   62,688x = 8,204,011,776
5. Step 5: Solve for x
   x = 8,204,011,776/62,688
6. Step 6: Final answer
   x = 130,870.53