Finding the Fourth Proportional to 1,388,834.69, 2,081,360.37 and 781,912.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,834.69 : 2,081,360.37 = 781,912.76 : x
2. Step 2: Convert to fraction form
   1,388,834.69/2,081,360.37 = 781,912.76/x
3. Step 3: Cross multiply
   1,388,834.69x = 2,081,360.37 × 781,912.76
4. Step 4: Simplify right side
   1,388,834.69x = 1,627,442,231,461.32
5. Step 5: Solve for x
   x = 1,627,442,231,461.32/1,388,834.69
6. Step 6: Final answer
   x = 1,171,804.13