Finding the Third Proportional to 221,574 and 487,432.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,574 : 487,432.50 = 487,432.50 : x
2. Step 2: Convert to fraction form
   221,574/487,432.50 = 487,432.50/x
3. Step 3: Cross multiply
   221,574x = 487,432.50 × 487,432.50
4. Step 4: Simplify right side
   221,574x = 237,590,442,056.25
5. Step 5: Solve for x
   x = 237,590,442,056.25/221,574
6. Step 6: Final answer
   x = 1,072,284.84