Finding the Fourth Proportional to 81,064.67, 121,513.86 and 31,131.32

Step by Step Solution

1. Step 1: Write the proportion equation
   81,064.67 : 121,513.86 = 31,131.32 : x
2. Step 2: Convert to fraction form
   81,064.67/121,513.86 = 31,131.32/x
3. Step 3: Cross multiply
   81,064.67x = 121,513.86 × 31,131.32
4. Step 4: Simplify right side
   81,064.67x = 3,782,886,252.53
5. Step 5: Solve for x
   x = 3,782,886,252.53/81,064.67
6. Step 6: Final answer
   x = 46,665.05