Finding the Fourth Proportional to 100.34, 150.42 and 57.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.34 : 150.42 = 57.50 : x
2. Step 2: Convert to fraction form
   100.34/150.42 = 57.50/x
3. Step 3: Cross multiply
   100.34x = 150.42 × 57.50
4. Step 4: Simplify right side
   100.34x = 8,649.15
5. Step 5: Solve for x
   x = 8,649.15/100.34
6. Step 6: Final answer
   x = 86.20