Finding the Fourth Proportional to 90,980.18, 136,486.47 and 31,005.33

Step by Step Solution

1. Step 1: Write the proportion equation
   90,980.18 : 136,486.47 = 31,005.33 : x
2. Step 2: Convert to fraction form
   90,980.18/136,486.47 = 31,005.33/x
3. Step 3: Cross multiply
   90,980.18x = 136,486.47 × 31,005.33
4. Step 4: Simplify right side
   90,980.18x = 4,231,807,414.79
5. Step 5: Solve for x
   x = 4,231,807,414.79/90,980.18
6. Step 6: Final answer
   x = 46,513.51