Finding the Fourth Proportional to 91.83, 137.15 and 79.02

Step by Step Solution

1. Step 1: Write the proportion equation
   91.83 : 137.15 = 79.02 : x
2. Step 2: Convert to fraction form
   91.83/137.15 = 79.02/x
3. Step 3: Cross multiply
   91.83x = 137.15 × 79.02
4. Step 4: Simplify right side
   91.83x = 10,837.59
5. Step 5: Solve for x
   x = 10,837.59/91.83
6. Step 6: Final answer
   x = 118.02