Finding the Fourth Proportional to 99.57, 149.34 and 37.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99.57 : 149.34 = 37.86 : x
2. Step 2: Convert to fraction form
   99.57/149.34 = 37.86/x
3. Step 3: Cross multiply
   99.57x = 149.34 × 37.86
4. Step 4: Simplify right side
   99.57x = 5,654.01
5. Step 5: Solve for x
   x = 5,654.01/99.57
6. Step 6: Final answer
   x = 56.78