Finding the Third Proportional to 9,781.50 and 21,091.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.50 : 21,091.88 = 21,091.88 : x
2. Step 2: Convert to fraction form
   9,781.50/21,091.88 = 21,091.88/x
3. Step 3: Cross multiply
   9,781.50x = 21,091.88 × 21,091.88
4. Step 4: Simplify right side
   9,781.50x = 444,867,191.02
5. Step 5: Solve for x
   x = 444,867,191.02/9,781.50
6. Step 6: Final answer
   x = 45,480.47