Finding the Fourth Proportional to 1,007,300.67, 1,511,010.24 and 287,587.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,300.67 : 1,511,010.24 = 287,587.05 : x
2. Step 2: Convert to fraction form
   1,007,300.67/1,511,010.24 = 287,587.05/x
3. Step 3: Cross multiply
   1,007,300.67x = 1,511,010.24 × 287,587.05
4. Step 4: Simplify right side
   1,007,300.67x = 434,546,977,441.39
5. Step 5: Solve for x
   x = 434,546,977,441.39/1,007,300.67
6. Step 6: Final answer
   x = 431,397.49