Finding the Fourth Proportional to 3,012,978.87, 4,519,765.98 and 990,402.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,012,978.87 : 4,519,765.98 = 990,402.39 : x
2. Step 2: Convert to fraction form
   3,012,978.87/4,519,765.98 = 990,402.39/x
3. Step 3: Cross multiply
   3,012,978.87x = 4,519,765.98 × 990,402.39
4. Step 4: Simplify right side
   3,012,978.87x = 4,476,387,028,832.69
5. Step 5: Solve for x
   x = 4,476,387,028,832.69/3,012,978.87
6. Step 6: Final answer
   x = 1,485,701.43