Finding the Fourth Proportional to 374.32, 561.49 and 100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   374.32 : 561.49 = 100.42 : x
2. Step 2: Convert to fraction form
   374.32/561.49 = 100.42/x
3. Step 3: Cross multiply
   374.32x = 561.49 × 100.42
4. Step 4: Simplify right side
   374.32x = 56,384.83
5. Step 5: Solve for x
   x = 56,384.83/374.32
6. Step 6: Final answer
   x = 150.63