Finding the Fourth Proportional to 28,093.50, 42,142.68 and 7,317

Step by Step Solution

1. Step 1: Write the proportion equation
   28,093.50 : 42,142.68 = 7,317 : x
2. Step 2: Convert to fraction form
   28,093.50/42,142.68 = 7,317/x
3. Step 3: Cross multiply
   28,093.50x = 42,142.68 × 7,317
4. Step 4: Simplify right side
   28,093.50x = 308,357,989.56
5. Step 5: Solve for x
   x = 308,357,989.56/28,093.50
6. Step 6: Final answer
   x = 10,976.13