Finding the Fourth Proportional to 28,598.81, 42,898.52 and 7,822.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,598.81 : 42,898.52 = 7,822.31 : x
2. Step 2: Convert to fraction form
   28,598.81/42,898.52 = 7,822.31/x
3. Step 3: Cross multiply
   28,598.81x = 42,898.52 × 7,822.31
4. Step 4: Simplify right side
   28,598.81x = 335,565,648.78
5. Step 5: Solve for x
   x = 335,565,648.78/28,598.81
6. Step 6: Final answer
   x = 11,733.55