Finding the Fourth Proportional to 12,752.32, 19,131.56 and 4,431.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,752.32 : 19,131.56 = 4,431.12 : x
2. Step 2: Convert to fraction form
   12,752.32/19,131.56 = 4,431.12/x
3. Step 3: Cross multiply
   12,752.32x = 19,131.56 × 4,431.12
4. Step 4: Simplify right side
   12,752.32x = 84,774,238.15
5. Step 5: Solve for x
   x = 84,774,238.15/12,752.32
6. Step 6: Final answer
   x = 6,647.75