Finding the Fourth Proportional to 90,802.32, 136,216.17 and 31,629.30

Step by Step Solution

1. Step 1: Write the proportion equation
   90,802.32 : 136,216.17 = 31,629.30 : x
2. Step 2: Convert to fraction form
   90,802.32/136,216.17 = 31,629.30/x
3. Step 3: Cross multiply
   90,802.32x = 136,216.17 × 31,629.30
4. Step 4: Simplify right side
   90,802.32x = 4,308,422,105.78
5. Step 5: Solve for x
   x = 4,308,422,105.78/90,802.32
6. Step 6: Final answer
   x = 47,448.37