Finding the Fourth Proportional to 9,051.50, 12,490.66 and 5,072.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.50 : 12,490.66 = 5,072.58 : x
2. Step 2: Convert to fraction form
   9,051.50/12,490.66 = 5,072.58/x
3. Step 3: Cross multiply
   9,051.50x = 12,490.66 × 5,072.58
4. Step 4: Simplify right side
   9,051.50x = 63,359,872.10
5. Step 5: Solve for x
   x = 63,359,872.10/9,051.50
6. Step 6: Final answer
   x = 6,999.93