Finding the Fourth Proportional to 12,799.20, 19,191.58 and 5,298.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,799.20 : 19,191.58 = 5,298.53 : x
2. Step 2: Convert to fraction form
   12,799.20/19,191.58 = 5,298.53/x
3. Step 3: Cross multiply
   12,799.20x = 19,191.58 × 5,298.53
4. Step 4: Simplify right side
   12,799.20x = 101,687,053.17
5. Step 5: Solve for x
   x = 101,687,053.17/12,799.20
6. Step 6: Final answer
   x = 7,944.80