Finding the Fourth Proportional to 693,339.42, 956,814.72 and 406,864.28

Step by Step Solution

1. Step 1: Write the proportion equation
   693,339.42 : 956,814.72 = 406,864.28 : x
2. Step 2: Convert to fraction form
   693,339.42/956,814.72 = 406,864.28/x
3. Step 3: Cross multiply
   693,339.42x = 956,814.72 × 406,864.28
4. Step 4: Simplify right side
   693,339.42x = 389,293,732,146.20
5. Step 5: Solve for x
   x = 389,293,732,146.20/693,339.42
6. Step 6: Final answer
   x = 561,476.42