Finding the Third Proportional to 138,445.50 and 300,901.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,445.50 : 300,901.50 = 300,901.50 : x
2. Step 2: Convert to fraction form
   138,445.50/300,901.50 = 300,901.50/x
3. Step 3: Cross multiply
   138,445.50x = 300,901.50 × 300,901.50
4. Step 4: Simplify right side
   138,445.50x = 90,541,712,702.25
5. Step 5: Solve for x
   x = 90,541,712,702.25/138,445.50
6. Step 6: Final answer
   x = 653,988.12