Finding the Fourth Proportional to 10,072.36, 15,105.98 and 3,913

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.36 : 15,105.98 = 3,913 : x
2. Step 2: Convert to fraction form
   10,072.36/15,105.98 = 3,913/x
3. Step 3: Cross multiply
   10,072.36x = 15,105.98 × 3,913
4. Step 4: Simplify right side
   10,072.36x = 59,109,699.74
5. Step 5: Solve for x
   x = 59,109,699.74/10,072.36
6. Step 6: Final answer
   x = 5,868.51