Finding the Fourth Proportional to 1,385,978.34, 1,912,629.95 and 774,139.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385,978.34 : 1,912,629.95 = 774,139.82 : x
2. Step 2: Convert to fraction form
   1,385,978.34/1,912,629.95 = 774,139.82/x
3. Step 3: Cross multiply
   1,385,978.34x = 1,912,629.95 × 774,139.82
4. Step 4: Simplify right side
   1,385,978.34x = 1,480,642,994,688.78
5. Step 5: Solve for x
   x = 1,480,642,994,688.78/1,385,978.34
6. Step 6: Final answer
   x = 1,068,301.68