Finding the Fourth Proportional to 90,783.05, 136,175.18 and 31,618.52

Step by Step Solution

1. Step 1: Write the proportion equation
   90,783.05 : 136,175.18 = 31,618.52 : x
2. Step 2: Convert to fraction form
   90,783.05/136,175.18 = 31,618.52/x
3. Step 3: Cross multiply
   90,783.05x = 136,175.18 × 31,618.52
4. Step 4: Simplify right side
   90,783.05x = 4,305,657,324.02
5. Step 5: Solve for x
   x = 4,305,657,324.02/90,783.05
6. Step 6: Final answer
   x = 47,427.99