Finding the Fourth Proportional to 102.51, 153.59 and 83.37

Step by Step Solution

1. Step 1: Write the proportion equation
   102.51 : 153.59 = 83.37 : x
2. Step 2: Convert to fraction form
   102.51/153.59 = 83.37/x
3. Step 3: Cross multiply
   102.51x = 153.59 × 83.37
4. Step 4: Simplify right side
   102.51x = 12,804.38
5. Step 5: Solve for x
   x = 12,804.38/102.51
6. Step 6: Final answer
   x = 124.91