Finding the Fourth Proportional to 90,049.48, 135,031.82 and 52,620.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90,049.48 : 135,031.82 = 52,620.37 : x
2. Step 2: Convert to fraction form
   90,049.48/135,031.82 = 52,620.37/x
3. Step 3: Cross multiply
   90,049.48x = 135,031.82 × 52,620.37
4. Step 4: Simplify right side
   90,049.48x = 7,105,423,729.49
5. Step 5: Solve for x
   x = 7,105,423,729.49/90,049.48
6. Step 6: Final answer
   x = 78,905.77