Finding the Fourth Proportional to 56,802.47, 78,390.83 and 31,308.80

Step by Step Solution

1. Step 1: Write the proportion equation
   56,802.47 : 78,390.83 = 31,308.80 : x
2. Step 2: Convert to fraction form
   56,802.47/78,390.83 = 31,308.80/x
3. Step 3: Cross multiply
   56,802.47x = 78,390.83 × 31,308.80
4. Step 4: Simplify right side
   56,802.47x = 2,454,322,818.30
5. Step 5: Solve for x
   x = 2,454,322,818.30/56,802.47
6. Step 6: Final answer
   x = 43,208.03