Finding the Fourth Proportional to 1,078,485.69, 1,488,849.57 and 670,718.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,485.69 : 1,488,849.57 = 670,718.91 : x
2. Step 2: Convert to fraction form
   1,078,485.69/1,488,849.57 = 670,718.91/x
3. Step 3: Cross multiply
   1,078,485.69x = 1,488,849.57 × 670,718.91
4. Step 4: Simplify right side
   1,078,485.69x = 998,599,560,744.37
5. Step 5: Solve for x
   x = 998,599,560,744.37/1,078,485.69
6. Step 6: Final answer
   x = 925,927.50