Finding the Fourth Proportional to 143,419.33, 215,128.89 and 43,579.12

Step by Step Solution

1. Step 1: Write the proportion equation
   143,419.33 : 215,128.89 = 43,579.12 : x
2. Step 2: Convert to fraction form
   143,419.33/215,128.89 = 43,579.12/x
3. Step 3: Cross multiply
   143,419.33x = 215,128.89 × 43,579.12
4. Step 4: Simplify right side
   143,419.33x = 9,375,127,712.78
5. Step 5: Solve for x
   x = 9,375,127,712.78/143,419.33
6. Step 6: Final answer
   x = 65,368.65