Finding the Fourth Proportional to 56,882.58, 78,498.81 and 31,388.55

Step by Step Solution

1. Step 1: Write the proportion equation
   56,882.58 : 78,498.81 = 31,388.55 : x
2. Step 2: Convert to fraction form
   56,882.58/78,498.81 = 31,388.55/x
3. Step 3: Cross multiply
   56,882.58x = 78,498.81 × 31,388.55
4. Step 4: Simplify right side
   56,882.58x = 2,463,963,822.63
5. Step 5: Solve for x
   x = 2,463,963,822.63/56,882.58
6. Step 6: Final answer
   x = 43,316.67