Finding the Fourth Proportional to 28,598.50, 42,900.72 and 7,822

Step by Step Solution

1. Step 1: Write the proportion equation
   28,598.50 : 42,900.72 = 7,822 : x
2. Step 2: Convert to fraction form
   28,598.50/42,900.72 = 7,822/x
3. Step 3: Cross multiply
   28,598.50x = 42,900.72 × 7,822
4. Step 4: Simplify right side
   28,598.50x = 335,569,431.84
5. Step 5: Solve for x
   x = 335,569,431.84/28,598.50
6. Step 6: Final answer
   x = 11,733.81