Finding the Fourth Proportional to 1,054,155.69, 1,581,528.78 and 423,512.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054,155.69 : 1,581,528.78 = 423,512.37 : x
2. Step 2: Convert to fraction form
   1,054,155.69/1,581,528.78 = 423,512.37/x
3. Step 3: Cross multiply
   1,054,155.69x = 1,581,528.78 × 423,512.37
4. Step 4: Simplify right side
   1,054,155.69x = 669,797,001,841.01
5. Step 5: Solve for x
   x = 669,797,001,841.01/1,054,155.69
6. Step 6: Final answer
   x = 635,387.17