Finding the Fourth Proportional to 12,848.46, 17,730.56 and 7,812.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,848.46 : 17,730.56 = 7,812.84 : x
2. Step 2: Convert to fraction form
   12,848.46/17,730.56 = 7,812.84/x
3. Step 3: Cross multiply
   12,848.46x = 17,730.56 × 7,812.84
4. Step 4: Simplify right side
   12,848.46x = 138,526,028.39
5. Step 5: Solve for x
   x = 138,526,028.39/12,848.46
6. Step 6: Final answer
   x = 10,781.53