Finding the Fourth Proportional to 123.31, 184.71 and 75.19

Step by Step Solution

1. Step 1: Write the proportion equation
   123.31 : 184.71 = 75.19 : x
2. Step 2: Convert to fraction form
   123.31/184.71 = 75.19/x
3. Step 3: Cross multiply
   123.31x = 184.71 × 75.19
4. Step 4: Simplify right side
   123.31x = 13,888.34
5. Step 5: Solve for x
   x = 13,888.34/123.31
6. Step 6: Final answer
   x = 112.63