Finding the Fourth Proportional to 10,368.15, 15,570.45 and 10,040.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,368.15 : 15,570.45 = 10,040.10 : x
2. Step 2: Convert to fraction form
   10,368.15/15,570.45 = 10,040.10/x
3. Step 3: Cross multiply
   10,368.15x = 15,570.45 × 10,040.10
4. Step 4: Simplify right side
   10,368.15x = 156,328,875.05
5. Step 5: Solve for x
   x = 156,328,875.05/10,368.15
6. Step 6: Final answer
   x = 15,077.80