Finding the Fourth Proportional to 102,057.78, 153,095.31 and 28,185.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,057.78 : 153,095.31 = 28,185.78 : x
2. Step 2: Convert to fraction form
   102,057.78/153,095.31 = 28,185.78/x
3. Step 3: Cross multiply
   102,057.78x = 153,095.31 × 28,185.78
4. Step 4: Simplify right side
   102,057.78x = 4,315,110,726.69
5. Step 5: Solve for x
   x = 4,315,110,726.69/102,057.78
6. Step 6: Final answer
   x = 42,281.06