Finding the Fourth Proportional to 778,404.34, 1,074,196.11 and 438,870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   778,404.34 : 1,074,196.11 = 438,870.16 : x
2. Step 2: Convert to fraction form
   778,404.34/1,074,196.11 = 438,870.16/x
3. Step 3: Cross multiply
   778,404.34x = 1,074,196.11 × 438,870.16
4. Step 4: Simplify right side
   778,404.34x = 471,432,618,667.08
5. Step 5: Solve for x
   x = 471,432,618,667.08/778,404.34
6. Step 6: Final answer
   x = 605,639.76