Finding the Fourth Proportional to 101.76, 139.50 and 100.34

Step by Step Solution

1. Step 1: Write the proportion equation
   101.76 : 139.50 = 100.34 : x
2. Step 2: Convert to fraction form
   101.76/139.50 = 100.34/x
3. Step 3: Cross multiply
   101.76x = 139.50 × 100.34
4. Step 4: Simplify right side
   101.76x = 13,997.43
5. Step 5: Solve for x
   x = 13,997.43/101.76
6. Step 6: Final answer
   x = 137.55