Finding the Fourth Proportional to 7,499.61, 10,348.74 and 4,142.21

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.61 : 10,348.74 = 4,142.21 : x
2. Step 2: Convert to fraction form
   7,499.61/10,348.74 = 4,142.21/x
3. Step 3: Cross multiply
   7,499.61x = 10,348.74 × 4,142.21
4. Step 4: Simplify right side
   7,499.61x = 42,866,602.57
5. Step 5: Solve for x
   x = 42,866,602.57/7,499.61
6. Step 6: Final answer
   x = 5,715.84