Finding the Fourth Proportional to 1,389,333.34, 1,917,360.81 and 777,480.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,333.34 : 1,917,360.81 = 777,480.82 : x
2. Step 2: Convert to fraction form
   1,389,333.34/1,917,360.81 = 777,480.82/x
3. Step 3: Cross multiply
   1,389,333.34x = 1,917,360.81 × 777,480.82
4. Step 4: Simplify right side
   1,389,333.34x = 1,490,711,254,794.66
5. Step 5: Solve for x
   x = 1,490,711,254,794.66/1,389,333.34
6. Step 6: Final answer
   x = 1,072,968.75