Finding the Fourth Proportional to 99.83, 137.61 and 98.01

Step by Step Solution

1. Step 1: Write the proportion equation
   99.83 : 137.61 = 98.01 : x
2. Step 2: Convert to fraction form
   99.83/137.61 = 98.01/x
3. Step 3: Cross multiply
   99.83x = 137.61 × 98.01
4. Step 4: Simplify right side
   99.83x = 13,487.16
5. Step 5: Solve for x
   x = 13,487.16/99.83
6. Step 6: Final answer
   x = 135.10