Finding the Third Proportional to 91,447.31 and 199,433.81

Step by Step Solution

1. Step 1: Write the proportion equation
   91,447.31 : 199,433.81 = 199,433.81 : x
2. Step 2: Convert to fraction form
   91,447.31/199,433.81 = 199,433.81/x
3. Step 3: Cross multiply
   91,447.31x = 199,433.81 × 199,433.81
4. Step 4: Simplify right side
   91,447.31x = 39,773,845,568.29
5. Step 5: Solve for x
   x = 39,773,845,568.29/91,447.31
6. Step 6: Final answer
   x = 434,937.28