Finding the Fourth Proportional to 99.94, 149.72 and 83.70

Step by Step Solution

1. Step 1: Write the proportion equation
   99.94 : 149.72 = 83.70 : x
2. Step 2: Convert to fraction form
   99.94/149.72 = 83.70/x
3. Step 3: Cross multiply
   99.94x = 149.72 × 83.70
4. Step 4: Simplify right side
   99.94x = 12,531.56
5. Step 5: Solve for x
   x = 12,531.56/99.94
6. Step 6: Final answer
   x = 125.39