Finding the Fourth Proportional to 61.56, 91.76 and 61.02

Step by Step Solution

1. Step 1: Write the proportion equation
   61.56 : 91.76 = 61.02 : x
2. Step 2: Convert to fraction form
   61.56/91.76 = 61.02/x
3. Step 3: Cross multiply
   61.56x = 91.76 × 61.02
4. Step 4: Simplify right side
   61.56x = 5,598.89
5. Step 5: Solve for x
   x = 5,598.89/61.56
6. Step 6: Final answer
   x = 90.95