Finding the Fourth Proportional to 99.10, 147.83 and 91.27

Step by Step Solution

1. Step 1: Write the proportion equation
   99.10 : 147.83 = 91.27 : x
2. Step 2: Convert to fraction form
   99.10/147.83 = 91.27/x
3. Step 3: Cross multiply
   99.10x = 147.83 × 91.27
4. Step 4: Simplify right side
   99.10x = 13,492.44
5. Step 5: Solve for x
   x = 13,492.44/99.10
6. Step 6: Final answer
   x = 136.15