Finding the Fourth Proportional to 7,499.98, 10,349.47 and 4,142.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.98 : 10,349.47 = 4,142.80 : x
2. Step 2: Convert to fraction form
   7,499.98/10,349.47 = 4,142.80/x
3. Step 3: Cross multiply
   7,499.98x = 10,349.47 × 4,142.80
4. Step 4: Simplify right side
   7,499.98x = 42,875,784.32
5. Step 5: Solve for x
   x = 42,875,784.32/7,499.98
6. Step 6: Final answer
   x = 5,716.79