Finding the Third Proportional to 399,373.88 and 871,931.25

Step by Step Solution

1. Step 1: Write the proportion equation
   399,373.88 : 871,931.25 = 871,931.25 : x
2. Step 2: Convert to fraction form
   399,373.88/871,931.25 = 871,931.25/x
3. Step 3: Cross multiply
   399,373.88x = 871,931.25 × 871,931.25
4. Step 4: Simplify right side
   399,373.88x = 760,264,104,726.56
5. Step 5: Solve for x
   x = 760,264,104,726.56/399,373.88
6. Step 6: Final answer
   x = 1,903,640.05