Finding the Third Proportional to 28,909.50 and 63,111

Step by Step Solution

1. Step 1: Write the proportion equation
   28,909.50 : 63,111 = 63,111 : x
2. Step 2: Convert to fraction form
   28,909.50/63,111 = 63,111/x
3. Step 3: Cross multiply
   28,909.50x = 63,111 × 63,111
4. Step 4: Simplify right side
   28,909.50x = 3,982,998,321
5. Step 5: Solve for x
   x = 3,982,998,321/28,909.50
6. Step 6: Final answer
   x = 137,774.72