Finding the Third Proportional to 130,680 and 286,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   130,680 : 286,258.50 = 286,258.50 : x
2. Step 2: Convert to fraction form
   130,680/286,258.50 = 286,258.50/x
3. Step 3: Cross multiply
   130,680x = 286,258.50 × 286,258.50
4. Step 4: Simplify right side
   130,680x = 81,943,928,822.25
5. Step 5: Solve for x
   x = 81,943,928,822.25/130,680
6. Step 6: Final answer
   x = 627,057.92