Finding the Fourth Proportional to 90,840.27, 136,266.17 and 28,513.23

Step by Step Solution

1. Step 1: Write the proportion equation
   90,840.27 : 136,266.17 = 28,513.23 : x
2. Step 2: Convert to fraction form
   90,840.27/136,266.17 = 28,513.23/x
3. Step 3: Cross multiply
   90,840.27x = 136,266.17 × 28,513.23
4. Step 4: Simplify right side
   90,840.27x = 3,885,388,503.86
5. Step 5: Solve for x
   x = 3,885,388,503.86/90,840.27
6. Step 6: Final answer
   x = 42,771.65