Finding the Third Proportional to 387,192 and 830,435.25

Step by Step Solution

1. Step 1: Write the proportion equation
   387,192 : 830,435.25 = 830,435.25 : x
2. Step 2: Convert to fraction form
   387,192/830,435.25 = 830,435.25/x
3. Step 3: Cross multiply
   387,192x = 830,435.25 × 830,435.25
4. Step 4: Simplify right side
   387,192x = 689,622,704,442.56
5. Step 5: Solve for x
   x = 689,622,704,442.56/387,192
6. Step 6: Final answer
   x = 1,781,087.17