Finding the Fourth Proportional to 100.83, 137.94 and 100.43

Step by Step Solution

1. Step 1: Write the proportion equation
   100.83 : 137.94 = 100.43 : x
2. Step 2: Convert to fraction form
   100.83/137.94 = 100.43/x
3. Step 3: Cross multiply
   100.83x = 137.94 × 100.43
4. Step 4: Simplify right side
   100.83x = 13,853.31
5. Step 5: Solve for x
   x = 13,853.31/100.83
6. Step 6: Final answer
   x = 137.39