Finding the Fourth Proportional to 56,578.09, 78,078.29 and 31,084.98

Step by Step Solution

1. Step 1: Write the proportion equation
   56,578.09 : 78,078.29 = 31,084.98 : x
2. Step 2: Convert to fraction form
   56,578.09/78,078.29 = 31,084.98/x
3. Step 3: Cross multiply
   56,578.09x = 78,078.29 × 31,084.98
4. Step 4: Simplify right side
   56,578.09x = 2,427,061,832.09
5. Step 5: Solve for x
   x = 2,427,061,832.09/56,578.09
6. Step 6: Final answer
   x = 42,897.56