Finding the Fourth Proportional to 821,419.58, 1,230,456.24 and 670,155.72

Step by Step Solution

1. Step 1: Write the proportion equation
   821,419.58 : 1,230,456.24 = 670,155.72 : x
2. Step 2: Convert to fraction form
   821,419.58/1,230,456.24 = 670,155.72/x
3. Step 3: Cross multiply
   821,419.58x = 1,230,456.24 × 670,155.72
4. Step 4: Simplify right side
   821,419.58x = 824,597,287,445.69
5. Step 5: Solve for x
   x = 824,597,287,445.69/821,419.58
6. Step 6: Final answer
   x = 1,003,868.56