Finding the Fourth Proportional to 1,438,654.48, 1,985,046.72 and 826,688.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438,654.48 : 1,985,046.72 = 826,688.98 : x
2. Step 2: Convert to fraction form
   1,438,654.48/1,985,046.72 = 826,688.98/x
3. Step 3: Cross multiply
   1,438,654.48x = 1,985,046.72 × 826,688.98
4. Step 4: Simplify right side
   1,438,654.48x = 1,641,016,248,209.15
5. Step 5: Solve for x
   x = 1,641,016,248,209.15/1,438,654.48
6. Step 6: Final answer
   x = 1,140,660.44