Finding the Fourth Proportional to 165,667.50, 228,623.58 and 90,216

Step by Step Solution

1. Step 1: Write the proportion equation
   165,667.50 : 228,623.58 = 90,216 : x
2. Step 2: Convert to fraction form
   165,667.50/228,623.58 = 90,216/x
3. Step 3: Cross multiply
   165,667.50x = 228,623.58 × 90,216
4. Step 4: Simplify right side
   165,667.50x = 20,625,504,893.28
5. Step 5: Solve for x
   x = 20,625,504,893.28/165,667.50
6. Step 6: Final answer
   x = 124,499.40