Finding the Fourth Proportional to 709,089.48, 978,549.72 and 386,801.04

Step by Step Solution

1. Step 1: Write the proportion equation
   709,089.48 : 978,549.72 = 386,801.04 : x
2. Step 2: Convert to fraction form
   709,089.48/978,549.72 = 386,801.04/x
3. Step 3: Cross multiply
   709,089.48x = 978,549.72 × 386,801.04
4. Step 4: Simplify right side
   709,089.48x = 378,504,049,387.71
5. Step 5: Solve for x
   x = 378,504,049,387.71/709,089.48
6. Step 6: Final answer
   x = 533,788.84