Finding the Fourth Proportional to 7,298.36, 10,112.42 and 7,140.71

Step by Step Solution

1. Step 1: Write the proportion equation
   7,298.36 : 10,112.42 = 7,140.71 : x
2. Step 2: Convert to fraction form
   7,298.36/10,112.42 = 7,140.71/x
3. Step 3: Cross multiply
   7,298.36x = 10,112.42 × 7,140.71
4. Step 4: Simplify right side
   7,298.36x = 72,209,822.91
5. Step 5: Solve for x
   x = 72,209,822.91/7,298.36
6. Step 6: Final answer
   x = 9,893.99