Finding the Fourth Proportional to 709,402.84, 978,967.86 and 387,118.42

Step by Step Solution

1. Step 1: Write the proportion equation
   709,402.84 : 978,967.86 = 387,118.42 : x
2. Step 2: Convert to fraction form
   709,402.84/978,967.86 = 387,118.42/x
3. Step 3: Cross multiply
   709,402.84x = 978,967.86 × 387,118.42
4. Step 4: Simplify right side
   709,402.84x = 378,976,487,294.87
5. Step 5: Solve for x
   x = 378,976,487,294.87/709,402.84
6. Step 6: Final answer
   x = 534,219.02