Finding the Third Proportional to 220,761 and 349,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   220,761 : 349,798.50 = 349,798.50 : x
2. Step 2: Convert to fraction form
   220,761/349,798.50 = 349,798.50/x
3. Step 3: Cross multiply
   220,761x = 349,798.50 × 349,798.50
4. Step 4: Simplify right side
   220,761x = 122,358,990,602.25
5. Step 5: Solve for x
   x = 122,358,990,602.25/220,761
6. Step 6: Final answer
   x = 554,259.99