Finding the Third Proportional to 538,390 and 834,054

Step by Step Solution

1. Step 1: Write the proportion equation
   538,390 : 834,054 = 834,054 : x
2. Step 2: Convert to fraction form
   538,390/834,054 = 834,054/x
3. Step 3: Cross multiply
   538,390x = 834,054 × 834,054
4. Step 4: Simplify right side
   538,390x = 695,646,074,916
5. Step 5: Solve for x
   x = 695,646,074,916/538,390
6. Step 6: Final answer
   x = 1,292,085.80