Finding the Fourth Proportional to 12,870.32, 17,762.54 and 7,837.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.32 : 17,762.54 = 7,837.49 : x
2. Step 2: Convert to fraction form
   12,870.32/17,762.54 = 7,837.49/x
3. Step 3: Cross multiply
   12,870.32x = 17,762.54 × 7,837.49
4. Step 4: Simplify right side
   12,870.32x = 139,213,741.46
5. Step 5: Solve for x
   x = 139,213,741.46/12,870.32
6. Step 6: Final answer
   x = 10,816.65