Finding the Fourth Proportional to 387,513.77, 534,766.59 and 217,747.89

Step by Step Solution

1. Step 1: Write the proportion equation
   387,513.77 : 534,766.59 = 217,747.89 : x
2. Step 2: Convert to fraction form
   387,513.77/534,766.59 = 217,747.89/x
3. Step 3: Cross multiply
   387,513.77x = 534,766.59 × 217,747.89
4. Step 4: Simplify right side
   387,513.77x = 116,444,296,615.00
5. Step 5: Solve for x
   x = 116,444,296,615.00/387,513.77
6. Step 6: Final answer
   x = 300,490.74