Finding the Fourth Proportional to 90,050.48, 135,033.31 and 52,621.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90,050.48 : 135,033.31 = 52,621.37 : x
2. Step 2: Convert to fraction form
   90,050.48/135,033.31 = 52,621.37/x
3. Step 3: Cross multiply
   90,050.48x = 135,033.31 × 52,621.37
4. Step 4: Simplify right side
   90,050.48x = 7,105,637,767.83
5. Step 5: Solve for x
   x = 7,105,637,767.83/90,050.48
6. Step 6: Final answer
   x = 78,907.27