Finding the Fourth Proportional to 12,476.90, 18,699.10 and 5,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,476.90 : 18,699.10 = 5,072.72 : x
2. Step 2: Convert to fraction form
   12,476.90/18,699.10 = 5,072.72/x
3. Step 3: Cross multiply
   12,476.90x = 18,699.10 × 5,072.72
4. Step 4: Simplify right side
   12,476.90x = 94,855,298.55
5. Step 5: Solve for x
   x = 94,855,298.55/12,476.90
6. Step 6: Final answer
   x = 7,602.47