Finding the Third Proportional to 214,390.50 and 423,360

Step by Step Solution

1. Step 1: Write the proportion equation
   214,390.50 : 423,360 = 423,360 : x
2. Step 2: Convert to fraction form
   214,390.50/423,360 = 423,360/x
3. Step 3: Cross multiply
   214,390.50x = 423,360 × 423,360
4. Step 4: Simplify right side
   214,390.50x = 179,233,689,600
5. Step 5: Solve for x
   x = 179,233,689,600/214,390.50
6. Step 6: Final answer
   x = 836,015.07