Finding the Fourth Proportional to 153.34, 211.59 and 100.98

Step by Step Solution

1. Step 1: Write the proportion equation
   153.34 : 211.59 = 100.98 : x
2. Step 2: Convert to fraction form
   153.34/211.59 = 100.98/x
3. Step 3: Cross multiply
   153.34x = 211.59 × 100.98
4. Step 4: Simplify right side
   153.34x = 21,367.39
5. Step 5: Solve for x
   x = 21,367.39/153.34
6. Step 6: Final answer
   x = 139.35