Finding the Fourth Proportional to 99.56, 149.34 and 83.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99.56 : 149.34 = 83.63 : x
2. Step 2: Convert to fraction form
   99.56/149.34 = 83.63/x
3. Step 3: Cross multiply
   99.56x = 149.34 × 83.63
4. Step 4: Simplify right side
   99.56x = 12,489.30
5. Step 5: Solve for x
   x = 12,489.30/99.56
6. Step 6: Final answer
   x = 125.45