Finding the Fourth Proportional to 1,238,456.61, 1,709,127.68 and 773,585.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238,456.61 : 1,709,127.68 = 773,585.78 : x
2. Step 2: Convert to fraction form
   1,238,456.61/1,709,127.68 = 773,585.78/x
3. Step 3: Cross multiply
   1,238,456.61x = 1,709,127.68 × 773,585.78
4. Step 4: Simplify right side
   1,238,456.61x = 1,322,156,857,038.82
5. Step 5: Solve for x
   x = 1,322,156,857,038.82/1,238,456.61
6. Step 6: Final answer
   x = 1,067,584.32