Finding the Fourth Proportional to 90,342.82, 135,535.76 and 31,179

Step by Step Solution

1. Step 1: Write the proportion equation
   90,342.82 : 135,535.76 = 31,179 : x
2. Step 2: Convert to fraction form
   90,342.82/135,535.76 = 31,179/x
3. Step 3: Cross multiply
   90,342.82x = 135,535.76 × 31,179
4. Step 4: Simplify right side
   90,342.82x = 4,225,869,305.15
5. Step 5: Solve for x
   x = 4,225,869,305.15/90,342.82
6. Step 6: Final answer
   x = 46,775.93