Finding the Fourth Proportional to 56,644.61, 78,170.27 and 31,153.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,644.61 : 78,170.27 = 31,153.77 : x
2. Step 2: Convert to fraction form
   56,644.61/78,170.27 = 31,153.77/x
3. Step 3: Cross multiply
   56,644.61x = 78,170.27 × 31,153.77
4. Step 4: Simplify right side
   56,644.61x = 2,435,298,456.65
5. Step 5: Solve for x
   x = 2,435,298,456.65/56,644.61
6. Step 6: Final answer
   x = 42,992.59