Finding the Third Proportional to 28,231 and 42,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,231 : 42,209.50 = 42,209.50 : x
2. Step 2: Convert to fraction form
   28,231/42,209.50 = 42,209.50/x
3. Step 3: Cross multiply
   28,231x = 42,209.50 × 42,209.50
4. Step 4: Simplify right side
   28,231x = 1,781,641,890.25
5. Step 5: Solve for x
   x = 1,781,641,890.25/28,231
6. Step 6: Final answer
   x = 63,109.41