Finding the Fourth Proportional to 1,685,404.69, 2,325,858.48 and 921,458.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685,404.69 : 2,325,858.48 = 921,458.25 : x
2. Step 2: Convert to fraction form
   1,685,404.69/2,325,858.48 = 921,458.25/x
3. Step 3: Cross multiply
   1,685,404.69x = 2,325,858.48 × 921,458.25
4. Step 4: Simplify right side
   1,685,404.69x = 2,143,181,484,728.46
5. Step 5: Solve for x
   x = 2,143,181,484,728.46/1,685,404.69
6. Step 6: Final answer
   x = 1,271,612.39