Finding the Fourth Proportional to 1,147,072.74, 1,582,978.71 and 630,849.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147,072.74 : 1,582,978.71 = 630,849.21 : x
2. Step 2: Convert to fraction form
   1,147,072.74/1,582,978.71 = 630,849.21/x
3. Step 3: Cross multiply
   1,147,072.74x = 1,582,978.71 × 630,849.21
4. Step 4: Simplify right side
   1,147,072.74x = 998,620,868,650.32
5. Step 5: Solve for x
   x = 998,620,868,650.32/1,147,072.74
6. Step 6: Final answer
   x = 870,581.99