Finding the Fourth Proportional to 5,412.72, 8,112.42 and 4,312.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,412.72 : 8,112.42 = 4,312.56 : x
2. Step 2: Convert to fraction form
   5,412.72/8,112.42 = 4,312.56/x
3. Step 3: Cross multiply
   5,412.72x = 8,112.42 × 4,312.56
4. Step 4: Simplify right side
   5,412.72x = 34,985,298.00
5. Step 5: Solve for x
   x = 34,985,298.00/5,412.72
6. Step 6: Final answer
   x = 6,463.53