Finding the Fourth Proportional to 1,070,804.91, 1,604,065.42 and 644,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070,804.91 : 1,604,065.42 = 644,105.25 : x
2. Step 2: Convert to fraction form
   1,070,804.91/1,604,065.42 = 644,105.25/x
3. Step 3: Cross multiply
   1,070,804.91x = 1,604,065.42 × 644,105.25
4. Step 4: Simplify right side
   1,070,804.91x = 1,033,186,958,365.46
5. Step 5: Solve for x
   x = 1,033,186,958,365.46/1,070,804.91
6. Step 6: Final answer
   x = 964,869.46