Finding the Fourth Proportional to 100.15, 150.77 and 69.93

Step by Step Solution

1. Step 1: Write the proportion equation
   100.15 : 150.77 = 69.93 : x
2. Step 2: Convert to fraction form
   100.15/150.77 = 69.93/x
3. Step 3: Cross multiply
   100.15x = 150.77 × 69.93
4. Step 4: Simplify right side
   100.15x = 10,543.52
5. Step 5: Solve for x
   x = 10,543.52/100.15
6. Step 6: Final answer
   x = 105.28