Finding the Fourth Proportional to 9,051.29, 12,490.81 and 5,072.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.29 : 12,490.81 = 5,072.42 : x
2. Step 2: Convert to fraction form
   9,051.29/12,490.81 = 5,072.42/x
3. Step 3: Cross multiply
   9,051.29x = 12,490.81 × 5,072.42
4. Step 4: Simplify right side
   9,051.29x = 63,358,653.01
5. Step 5: Solve for x
   x = 63,358,653.01/9,051.29
6. Step 6: Final answer
   x = 6,999.95