Finding the Fourth Proportional to 1,388,162.56, 1,915,650.84 and 776,308.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,162.56 : 1,915,650.84 = 776,308.36 : x
2. Step 2: Convert to fraction form
   1,388,162.56/1,915,650.84 = 776,308.36/x
3. Step 3: Cross multiply
   1,388,162.56x = 1,915,650.84 × 776,308.36
4. Step 4: Simplify right side
   1,388,162.56x = 1,487,135,761,933.02
5. Step 5: Solve for x
   x = 1,487,135,761,933.02/1,388,162.56
6. Step 6: Final answer
   x = 1,071,297.99