Finding the Third Proportional to 279,100.69 and 611,395.17

Step by Step Solution

1. Step 1: Write the proportion equation
   279,100.69 : 611,395.17 = 611,395.17 : x
2. Step 2: Convert to fraction form
   279,100.69/611,395.17 = 611,395.17/x
3. Step 3: Cross multiply
   279,100.69x = 611,395.17 × 611,395.17
4. Step 4: Simplify right side
   279,100.69x = 373,804,056,192.06
5. Step 5: Solve for x
   x = 373,804,056,192.06/279,100.69
6. Step 6: Final answer
   x = 1,339,316.14