Finding the Third Proportional to 153,820 and 340,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,820 : 340,809.50 = 340,809.50 : x
2. Step 2: Convert to fraction form
   153,820/340,809.50 = 340,809.50/x
3. Step 3: Cross multiply
   153,820x = 340,809.50 × 340,809.50
4. Step 4: Simplify right side
   153,820x = 116,151,115,290.25
5. Step 5: Solve for x
   x = 116,151,115,290.25/153,820
6. Step 6: Final answer
   x = 755,110.62