Finding the Fourth Proportional to 90,023.49, 135,139.59 and 52,610.42

Step by Step Solution

1. Step 1: Write the proportion equation
   90,023.49 : 135,139.59 = 52,610.42 : x
2. Step 2: Convert to fraction form
   90,023.49/135,139.59 = 52,610.42/x
3. Step 3: Cross multiply
   90,023.49x = 135,139.59 × 52,610.42
4. Step 4: Simplify right side
   90,023.49x = 7,109,749,912.83
5. Step 5: Solve for x
   x = 7,109,749,912.83/90,023.49
6. Step 6: Final answer
   x = 78,976.61