Finding the Fourth Proportional to 100.59, 138.82 and 67.84

Step by Step Solution

1. Step 1: Write the proportion equation
   100.59 : 138.82 = 67.84 : x
2. Step 2: Convert to fraction form
   100.59/138.82 = 67.84/x
3. Step 3: Cross multiply
   100.59x = 138.82 × 67.84
4. Step 4: Simplify right side
   100.59x = 9,417.55
5. Step 5: Solve for x
   x = 9,417.55/100.59
6. Step 6: Final answer
   x = 93.62