Finding the Fourth Proportional to 81,100.71, 121,607.33 and 31,193.37

Step by Step Solution

1. Step 1: Write the proportion equation
   81,100.71 : 121,607.33 = 31,193.37 : x
2. Step 2: Convert to fraction form
   81,100.71/121,607.33 = 31,193.37/x
3. Step 3: Cross multiply
   81,100.71x = 121,607.33 × 31,193.37
4. Step 4: Simplify right side
   81,100.71x = 3,793,342,283.44
5. Step 5: Solve for x
   x = 3,793,342,283.44/81,100.71
6. Step 6: Final answer
   x = 46,773.23