Finding the Fourth Proportional to 100.82, 139.00 and 93.00

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 139.00 = 93.00 : x
2. Step 2: Convert to fraction form
   100.82/139.00 = 93.00/x
3. Step 3: Cross multiply
   100.82x = 139.00 × 93.00
4. Step 4: Simplify right side
   100.82x = 12,926.68
5. Step 5: Solve for x
   x = 12,926.68/100.82
6. Step 6: Final answer
   x = 128.22