Finding the Fourth Proportional to 90,402.12, 135,512.82 and 42,933.66

Step by Step Solution

1. Step 1: Write the proportion equation
   90,402.12 : 135,512.82 = 42,933.66 : x
2. Step 2: Convert to fraction form
   90,402.12/135,512.82 = 42,933.66/x
3. Step 3: Cross multiply
   90,402.12x = 135,512.82 × 42,933.66
4. Step 4: Simplify right side
   90,402.12x = 5,818,061,339.52
5. Step 5: Solve for x
   x = 5,818,061,339.52/90,402.12
6. Step 6: Final answer
   x = 64,357.58