Finding the Fourth Proportional to 7,479.42, 10,321.72 and 4,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,479.42 : 10,321.72 = 4,122.50 : x
2. Step 2: Convert to fraction form
   7,479.42/10,321.72 = 4,122.50/x
3. Step 3: Cross multiply
   7,479.42x = 10,321.72 × 4,122.50
4. Step 4: Simplify right side
   7,479.42x = 42,551,290.70
5. Step 5: Solve for x
   x = 42,551,290.70/7,479.42
6. Step 6: Final answer
   x = 5,689.12