Finding the Third Proportional to 286,498.50 and 435,972

Step by Step Solution

1. Step 1: Write the proportion equation
   286,498.50 : 435,972 = 435,972 : x
2. Step 2: Convert to fraction form
   286,498.50/435,972 = 435,972/x
3. Step 3: Cross multiply
   286,498.50x = 435,972 × 435,972
4. Step 4: Simplify right side
   286,498.50x = 190,071,584,784
5. Step 5: Solve for x
   x = 190,071,584,784/286,498.50
6. Step 6: Final answer
   x = 663,429.60