Finding the Fourth Proportional to 56,878.89, 78,492.15 and 31,037.46

Step by Step Solution

1. Step 1: Write the proportion equation
   56,878.89 : 78,492.15 = 31,037.46 : x
2. Step 2: Convert to fraction form
   56,878.89/78,492.15 = 31,037.46/x
3. Step 3: Cross multiply
   56,878.89x = 78,492.15 × 31,037.46
4. Step 4: Simplify right side
   56,878.89x = 2,436,196,965.94
5. Step 5: Solve for x
   x = 2,436,196,965.94/56,878.89
6. Step 6: Final answer
   x = 42,831.30