Finding the Fourth Proportional to 12,870.36, 17,763.30 and 7,837.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.36 : 17,763.30 = 7,837.02 : x
2. Step 2: Convert to fraction form
   12,870.36/17,763.30 = 7,837.02/x
3. Step 3: Cross multiply
   12,870.36x = 17,763.30 × 7,837.02
4. Step 4: Simplify right side
   12,870.36x = 139,211,337.37
5. Step 5: Solve for x
   x = 139,211,337.37/12,870.36
6. Step 6: Final answer
   x = 10,816.43