Finding the Fourth Proportional to 9,051.41, 12,490.80 and 5,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.41 : 12,490.80 = 5,072.50 : x
2. Step 2: Convert to fraction form
   9,051.41/12,490.80 = 5,072.50/x
3. Step 3: Cross multiply
   9,051.41x = 12,490.80 × 5,072.50
4. Step 4: Simplify right side
   9,051.41x = 63,359,583
5. Step 5: Solve for x
   x = 63,359,583/9,051.41
6. Step 6: Final answer
   x = 6,999.97