Finding the Fourth Proportional to 43,189.88, 64,788.53 and 12,025.13

Step by Step Solution

1. Step 1: Write the proportion equation
   43,189.88 : 64,788.53 = 12,025.13 : x
2. Step 2: Convert to fraction form
   43,189.88/64,788.53 = 12,025.13/x
3. Step 3: Cross multiply
   43,189.88x = 64,788.53 × 12,025.13
4. Step 4: Simplify right side
   43,189.88x = 779,090,111.69
5. Step 5: Solve for x
   x = 779,090,111.69/43,189.88
6. Step 6: Final answer
   x = 18,038.72