Finding the Fourth Proportional to 12,994.63, 19,499.47 and 7,072.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.63 : 19,499.47 = 7,072.11 : x
2. Step 2: Convert to fraction form
   12,994.63/19,499.47 = 7,072.11/x
3. Step 3: Cross multiply
   12,994.63x = 19,499.47 × 7,072.11
4. Step 4: Simplify right side
   12,994.63x = 137,902,379.10
5. Step 5: Solve for x
   x = 137,902,379.10/12,994.63
6. Step 6: Final answer
   x = 10,612.26