Finding the Third Proportional to 21,091.64 and 45,685.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,091.64 : 45,685.90 = 45,685.90 : x
2. Step 2: Convert to fraction form
   21,091.64/45,685.90 = 45,685.90/x
3. Step 3: Cross multiply
   21,091.64x = 45,685.90 × 45,685.90
4. Step 4: Simplify right side
   21,091.64x = 2,087,201,316.04
5. Step 5: Solve for x
   x = 2,087,201,316.04/21,091.64
6. Step 6: Final answer
   x = 98,958.70