Finding the Fourth Proportional to 152.42, 210.27 and 99.98

Step by Step Solution

1. Step 1: Write the proportion equation
   152.42 : 210.27 = 99.98 : x
2. Step 2: Convert to fraction form
   152.42/210.27 = 99.98/x
3. Step 3: Cross multiply
   152.42x = 210.27 × 99.98
4. Step 4: Simplify right side
   152.42x = 21,022.79
5. Step 5: Solve for x
   x = 21,022.79/152.42
6. Step 6: Final answer
   x = 137.93