Finding the Third Proportional to 478,342.50 and 740,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,342.50 : 740,620.50 = 740,620.50 : x
2. Step 2: Convert to fraction form
   478,342.50/740,620.50 = 740,620.50/x
3. Step 3: Cross multiply
   478,342.50x = 740,620.50 × 740,620.50
4. Step 4: Simplify right side
   478,342.50x = 548,518,725,020.25
5. Step 5: Solve for x
   x = 548,518,725,020.25/478,342.50
6. Step 6: Final answer
   x = 1,146,707.07