Finding the Fourth Proportional to 9,051.72, 12,491.63 and 5,072.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.72 : 12,491.63 = 5,072.76 : x
2. Step 2: Convert to fraction form
   9,051.72/12,491.63 = 5,072.76/x
3. Step 3: Cross multiply
   9,051.72x = 12,491.63 × 5,072.76
4. Step 4: Simplify right side
   9,051.72x = 63,367,015.64
5. Step 5: Solve for x
   x = 63,367,015.64/9,051.72
6. Step 6: Final answer
   x = 7,000.55