Finding the Fourth Proportional to 12,700.31, 19,051.72 and 4,379.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.31 : 19,051.72 = 4,379.23 : x
2. Step 2: Convert to fraction form
   12,700.31/19,051.72 = 4,379.23/x
3. Step 3: Cross multiply
   12,700.31x = 19,051.72 × 4,379.23
4. Step 4: Simplify right side
   12,700.31x = 83,431,863.78
5. Step 5: Solve for x
   x = 83,431,863.78/12,700.31
6. Step 6: Final answer
   x = 6,569.28