Finding the Fourth Proportional to 709,025, 978,457.56 and 386,742.02

Step by Step Solution

1. Step 1: Write the proportion equation
   709,025 : 978,457.56 = 386,742.02 : x
2. Step 2: Convert to fraction form
   709,025/978,457.56 = 386,742.02/x
3. Step 3: Cross multiply
   709,025x = 978,457.56 × 386,742.02
4. Step 4: Simplify right side
   709,025x = 378,410,653,238.67
5. Step 5: Solve for x
   x = 378,410,653,238.67/709,025
6. Step 6: Final answer
   x = 533,705.66