Finding the Fourth Proportional to 205,853.43, 308,748.61 and 56,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   205,853.43 : 308,748.61 = 56,105.78 : x
2. Step 2: Convert to fraction form
   205,853.43/308,748.61 = 56,105.78/x
3. Step 3: Cross multiply
   205,853.43x = 308,748.61 × 56,105.78
4. Step 4: Simplify right side
   205,853.43x = 17,322,580,726.06
5. Step 5: Solve for x
   x = 17,322,580,726.06/205,853.43
6. Step 6: Final answer
   x = 84,150.07