Finding the Fourth Proportional to 97.31, 145.89 and 42.47

Step by Step Solution

1. Step 1: Write the proportion equation
   97.31 : 145.89 = 42.47 : x
2. Step 2: Convert to fraction form
   97.31/145.89 = 42.47/x
3. Step 3: Cross multiply
   97.31x = 145.89 × 42.47
4. Step 4: Simplify right side
   97.31x = 6,195.77
5. Step 5: Solve for x
   x = 6,195.77/97.31
6. Step 6: Final answer
   x = 63.67