Finding the Fourth Proportional to 31,259.16, 43,150.86 and 30,416.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,259.16 : 43,150.86 = 30,416.76 : x
2. Step 2: Convert to fraction form
   31,259.16/43,150.86 = 30,416.76/x
3. Step 3: Cross multiply
   31,259.16x = 43,150.86 × 30,416.76
4. Step 4: Simplify right side
   31,259.16x = 1,312,509,352.41
5. Step 5: Solve for x
   x = 1,312,509,352.41/31,259.16
6. Step 6: Final answer
   x = 41,987.99