Finding the Fourth Proportional to 709,081.48, 978,538.69 and 386,793.01

Step by Step Solution

1. Step 1: Write the proportion equation
   709,081.48 : 978,538.69 = 386,793.01 : x
2. Step 2: Convert to fraction form
   709,081.48/978,538.69 = 386,793.01/x
3. Step 3: Cross multiply
   709,081.48x = 978,538.69 × 386,793.01
4. Step 4: Simplify right side
   709,081.48x = 378,491,925,306.56
5. Step 5: Solve for x
   x = 378,491,925,306.56/709,081.48
6. Step 6: Final answer
   x = 533,777.76