Finding the Third Proportional to 189,451.50 and 418,431

Step by Step Solution

1. Step 1: Write the proportion equation
   189,451.50 : 418,431 = 418,431 : x
2. Step 2: Convert to fraction form
   189,451.50/418,431 = 418,431/x
3. Step 3: Cross multiply
   189,451.50x = 418,431 × 418,431
4. Step 4: Simplify right side
   189,451.50x = 175,084,501,761
5. Step 5: Solve for x
   x = 175,084,501,761/189,451.50
6. Step 6: Final answer
   x = 924,165.30