Finding the Fourth Proportional to 61.42, 91.54 and 58.00

Step by Step Solution

1. Step 1: Write the proportion equation
   61.42 : 91.54 = 58.00 : x
2. Step 2: Convert to fraction form
   61.42/91.54 = 58.00/x
3. Step 3: Cross multiply
   61.42x = 91.54 × 58.00
4. Step 4: Simplify right side
   61.42x = 5,308.95
5. Step 5: Solve for x
   x = 5,308.95/61.42
6. Step 6: Final answer
   x = 86.44