Finding the Third Proportional to 189,432 and 437,400

Step by Step Solution

1. Step 1: Write the proportion equation
   189,432 : 437,400 = 437,400 : x
2. Step 2: Convert to fraction form
   189,432/437,400 = 437,400/x
3. Step 3: Cross multiply
   189,432x = 437,400 × 437,400
4. Step 4: Simplify right side
   189,432x = 191,318,760,000
5. Step 5: Solve for x
   x = 191,318,760,000/189,432
6. Step 6: Final answer
   x = 1,009,960.09