Finding the Fourth Proportional to 7,012.90, 9,670.89 and 5,440.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,012.90 : 9,670.89 = 5,440.42 : x
2. Step 2: Convert to fraction form
   7,012.90/9,670.89 = 5,440.42/x
3. Step 3: Cross multiply
   7,012.90x = 9,670.89 × 5,440.42
4. Step 4: Simplify right side
   7,012.90x = 52,613,703.37
5. Step 5: Solve for x
   x = 52,613,703.37/7,012.90
6. Step 6: Final answer
   x = 7,502.42