Finding the Fourth Proportional to 56,647.54, 78,172.05 and 31,153.96

Step by Step Solution

1. Step 1: Write the proportion equation
   56,647.54 : 78,172.05 = 31,153.96 : x
2. Step 2: Convert to fraction form
   56,647.54/78,172.05 = 31,153.96/x
3. Step 3: Cross multiply
   56,647.54x = 78,172.05 × 31,153.96
4. Step 4: Simplify right side
   56,647.54x = 2,435,368,918.82
5. Step 5: Solve for x
   x = 2,435,368,918.82/56,647.54
6. Step 6: Final answer
   x = 42,991.61