Finding the Third Proportional to 415,090 and 607,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   415,090 : 607,831.50 = 607,831.50 : x
2. Step 2: Convert to fraction form
   415,090/607,831.50 = 607,831.50/x
3. Step 3: Cross multiply
   415,090x = 607,831.50 × 607,831.50
4. Step 4: Simplify right side
   415,090x = 369,459,132,392.25
5. Step 5: Solve for x
   x = 369,459,132,392.25/415,090
6. Step 6: Final answer
   x = 890,069.94