Finding the Fourth Proportional to 140.86, 211.34 and 100.59

Step by Step Solution

1. Step 1: Write the proportion equation
   140.86 : 211.34 = 100.59 : x
2. Step 2: Convert to fraction form
   140.86/211.34 = 100.59/x
3. Step 3: Cross multiply
   140.86x = 211.34 × 100.59
4. Step 4: Simplify right side
   140.86x = 21,258.72
5. Step 5: Solve for x
   x = 21,258.72/140.86
6. Step 6: Final answer
   x = 150.92