Finding the Fourth Proportional to 90,108.78, 135,074.88 and 50,146.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90,108.78 : 135,074.88 = 50,146.82 : x
2. Step 2: Convert to fraction form
   90,108.78/135,074.88 = 50,146.82/x
3. Step 3: Cross multiply
   90,108.78x = 135,074.88 × 50,146.82
4. Step 4: Simplify right side
   90,108.78x = 6,773,575,018.51
5. Step 5: Solve for x
   x = 6,773,575,018.51/90,108.78
6. Step 6: Final answer
   x = 75,171.09