Finding the Fourth Proportional to 12,779.63, 17,631.84 and 7,472.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,779.63 : 17,631.84 = 7,472.51 : x
2. Step 2: Convert to fraction form
   12,779.63/17,631.84 = 7,472.51/x
3. Step 3: Cross multiply
   12,779.63x = 17,631.84 × 7,472.51
4. Step 4: Simplify right side
   12,779.63x = 131,754,100.72
5. Step 5: Solve for x
   x = 131,754,100.72/12,779.63
6. Step 6: Final answer
   x = 10,309.70