Finding the Third Proportional to 611,764.50 and 917,222

Step by Step Solution

1. Step 1: Write the proportion equation
   611,764.50 : 917,222 = 917,222 : x
2. Step 2: Convert to fraction form
   611,764.50/917,222 = 917,222/x
3. Step 3: Cross multiply
   611,764.50x = 917,222 × 917,222
4. Step 4: Simplify right side
   611,764.50x = 841,296,197,284
5. Step 5: Solve for x
   x = 841,296,197,284/611,764.50
6. Step 6: Final answer
   x = 1,375,196.17