Finding the Fourth Proportional to 684,112.30, 944,068.57 and 378,196.56

Step by Step Solution

1. Step 1: Write the proportion equation
   684,112.30 : 944,068.57 = 378,196.56 : x
2. Step 2: Convert to fraction form
   684,112.30/944,068.57 = 378,196.56/x
3. Step 3: Cross multiply
   684,112.30x = 944,068.57 × 378,196.56
4. Step 4: Simplify right side
   684,112.30x = 357,043,484,632.63
5. Step 5: Solve for x
   x = 357,043,484,632.63/684,112.30
6. Step 6: Final answer
   x = 521,907.71