Finding the Fourth Proportional to 12,870.07, 17,762.57 and 7,837.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.07 : 17,762.57 = 7,837.23 : x
2. Step 2: Convert to fraction form
   12,870.07/17,762.57 = 7,837.23/x
3. Step 3: Cross multiply
   12,870.07x = 17,762.57 × 7,837.23
4. Step 4: Simplify right side
   12,870.07x = 139,209,346.48
5. Step 5: Solve for x
   x = 139,209,346.48/12,870.07
6. Step 6: Final answer
   x = 10,816.52