Finding the Third Proportional to 871,312 and 1,876,128

Step by Step Solution

1. Step 1: Write the proportion equation
   871,312 : 1,876,128 = 1,876,128 : x
2. Step 2: Convert to fraction form
   871,312/1,876,128 = 1,876,128/x
3. Step 3: Cross multiply
   871,312x = 1,876,128 × 1,876,128
4. Step 4: Simplify right side
   871,312x = 3,519,856,272,384
5. Step 5: Solve for x
   x = 3,519,856,272,384/871,312
6. Step 6: Final answer
   x = 4,039,719.72