Finding the Third Proportional to 132,688 and 291,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,688 : 291,435.50 = 291,435.50 : x
2. Step 2: Convert to fraction form
   132,688/291,435.50 = 291,435.50/x
3. Step 3: Cross multiply
   132,688x = 291,435.50 × 291,435.50
4. Step 4: Simplify right side
   132,688x = 84,934,650,660.25
5. Step 5: Solve for x
   x = 84,934,650,660.25/132,688
6. Step 6: Final answer
   x = 640,108.00