Finding the Fourth Proportional to 56,804.12, 78,390.24 and 31,311.49

Step by Step Solution

1. Step 1: Write the proportion equation
   56,804.12 : 78,390.24 = 31,311.49 : x
2. Step 2: Convert to fraction form
   56,804.12/78,390.24 = 31,311.49/x
3. Step 3: Cross multiply
   56,804.12x = 78,390.24 × 31,311.49
4. Step 4: Simplify right side
   56,804.12x = 2,454,514,667.35
5. Step 5: Solve for x
   x = 2,454,514,667.35/56,804.12
6. Step 6: Final answer
   x = 43,210.15