Finding the Fourth Proportional to 90,365.01, 135,362.84 and 42,264.78

Step by Step Solution

1. Step 1: Write the proportion equation
   90,365.01 : 135,362.84 = 42,264.78 : x
2. Step 2: Convert to fraction form
   90,365.01/135,362.84 = 42,264.78/x
3. Step 3: Cross multiply
   90,365.01x = 135,362.84 × 42,264.78
4. Step 4: Simplify right side
   90,365.01x = 5,721,080,441.45
5. Step 5: Solve for x
   x = 5,721,080,441.45/90,365.01
6. Step 6: Final answer
   x = 63,310.79