Finding the Third Proportional to 431,970 and 608,041.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,970 : 608,041.50 = 608,041.50 : x
2. Step 2: Convert to fraction form
   431,970/608,041.50 = 608,041.50/x
3. Step 3: Cross multiply
   431,970x = 608,041.50 × 608,041.50
4. Step 4: Simplify right side
   431,970x = 369,714,465,722.25
5. Step 5: Solve for x
   x = 369,714,465,722.25/431,970
6. Step 6: Final answer
   x = 855,879.96