Finding the Third Proportional to 300,001.50 and 438,156

Step by Step Solution

1. Step 1: Write the proportion equation
   300,001.50 : 438,156 = 438,156 : x
2. Step 2: Convert to fraction form
   300,001.50/438,156 = 438,156/x
3. Step 3: Cross multiply
   300,001.50x = 438,156 × 438,156
4. Step 4: Simplify right side
   300,001.50x = 191,980,680,336
5. Step 5: Solve for x
   x = 191,980,680,336/300,001.50
6. Step 6: Final answer
   x = 639,932.40