Finding the Fourth Proportional to 503,256, 694,533.24 and 288,416.01

Step by Step Solution

1. Step 1: Write the proportion equation
   503,256 : 694,533.24 = 288,416.01 : x
2. Step 2: Convert to fraction form
   503,256/694,533.24 = 288,416.01/x
3. Step 3: Cross multiply
   503,256x = 694,533.24 × 288,416.01
4. Step 4: Simplify right side
   503,256x = 200,314,505,893.17
5. Step 5: Solve for x
   x = 200,314,505,893.17/503,256
6. Step 6: Final answer
   x = 398,036.99