Finding the Fourth Proportional to 695,721.72, 960,119.82 and 405,314.04

Step by Step Solution

1. Step 1: Write the proportion equation
   695,721.72 : 960,119.82 = 405,314.04 : x
2. Step 2: Convert to fraction form
   695,721.72/960,119.82 = 405,314.04/x
3. Step 3: Cross multiply
   695,721.72x = 960,119.82 × 405,314.04
4. Step 4: Simplify right side
   695,721.72x = 389,150,043,128.27
5. Step 5: Solve for x
   x = 389,150,043,128.27/695,721.72
6. Step 6: Final answer
   x = 559,347.27