Finding the Fourth Proportional to 158,112.71, 236,789.03 and 90,439.59

Step by Step Solution

1. Step 1: Write the proportion equation
   158,112.71 : 236,789.03 = 90,439.59 : x
2. Step 2: Convert to fraction form
   158,112.71/236,789.03 = 90,439.59/x
3. Step 3: Cross multiply
   158,112.71x = 236,789.03 × 90,439.59
4. Step 4: Simplify right side
   158,112.71x = 21,415,102,789.70
5. Step 5: Solve for x
   x = 21,415,102,789.70/158,112.71
6. Step 6: Final answer
   x = 135,442.01