Finding the Fourth Proportional to 12,955.01, 19,429.60 and 5,057.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.01 : 19,429.60 = 5,057.72 : x
2. Step 2: Convert to fraction form
   12,955.01/19,429.60 = 5,057.72/x
3. Step 3: Cross multiply
   12,955.01x = 19,429.60 × 5,057.72
4. Step 4: Simplify right side
   12,955.01x = 98,269,476.51
5. Step 5: Solve for x
   x = 98,269,476.51/12,955.01
6. Step 6: Final answer
   x = 7,585.44