Finding the Fourth Proportional to 386,805.69, 577,561.34 and 346,564.89

Step by Step Solution

1. Step 1: Write the proportion equation
   386,805.69 : 577,561.34 = 346,564.89 : x
2. Step 2: Convert to fraction form
   386,805.69/577,561.34 = 346,564.89/x
3. Step 3: Cross multiply
   386,805.69x = 577,561.34 × 346,564.89
4. Step 4: Simplify right side
   386,805.69x = 200,162,483,131.77
5. Step 5: Solve for x
   x = 200,162,483,131.77/386,805.69
6. Step 6: Final answer
   x = 517,475.54