Finding the Fourth Proportional to 152.39, 228.59 and 61.09

Step by Step Solution

1. Step 1: Write the proportion equation
   152.39 : 228.59 = 61.09 : x
2. Step 2: Convert to fraction form
   152.39/228.59 = 61.09/x
3. Step 3: Cross multiply
   152.39x = 228.59 × 61.09
4. Step 4: Simplify right side
   152.39x = 13,963.89
5. Step 5: Solve for x
   x = 13,963.89/152.39
6. Step 6: Final answer
   x = 91.63