Finding the Third Proportional to 91,268.72 and 199,742.91

Step by Step Solution

1. Step 1: Write the proportion equation
   91,268.72 : 199,742.91 = 199,742.91 : x
2. Step 2: Convert to fraction form
   91,268.72/199,742.91 = 199,742.91/x
3. Step 3: Cross multiply
   91,268.72x = 199,742.91 × 199,742.91
4. Step 4: Simplify right side
   91,268.72x = 39,897,228,597.20
5. Step 5: Solve for x
   x = 39,897,228,597.20/91,268.72
6. Step 6: Final answer
   x = 437,140.23