Finding the Third Proportional to 191,798 and 403,820

Step by Step Solution

1. Step 1: Write the proportion equation
   191,798 : 403,820 = 403,820 : x
2. Step 2: Convert to fraction form
   191,798/403,820 = 403,820/x
3. Step 3: Cross multiply
   191,798x = 403,820 × 403,820
4. Step 4: Simplify right side
   191,798x = 163,070,592,400
5. Step 5: Solve for x
   x = 163,070,592,400/191,798
6. Step 6: Final answer
   x = 850,220.50