Finding the Fourth Proportional to 136,146, 187,684.52 and 90,128.54

Step by Step Solution

1. Step 1: Write the proportion equation
   136,146 : 187,684.52 = 90,128.54 : x
2. Step 2: Convert to fraction form
   136,146/187,684.52 = 90,128.54/x
3. Step 3: Cross multiply
   136,146x = 187,684.52 × 90,128.54
4. Step 4: Simplify right side
   136,146x = 16,915,730,829.78
5. Step 5: Solve for x
   x = 16,915,730,829.78/136,146
6. Step 6: Final answer
   x = 124,246.99