Finding the Fourth Proportional to 38,719.86, 58,072.83 and 10,257

Step by Step Solution

1. Step 1: Write the proportion equation
   38,719.86 : 58,072.83 = 10,257 : x
2. Step 2: Convert to fraction form
   38,719.86/58,072.83 = 10,257/x
3. Step 3: Cross multiply
   38,719.86x = 58,072.83 × 10,257
4. Step 4: Simplify right side
   38,719.86x = 595,653,017.31
5. Step 5: Solve for x
   x = 595,653,017.31/38,719.86
6. Step 6: Final answer
   x = 15,383.66