Finding the Fourth Proportional to 56,814.39, 78,404.41 and 31,321.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,814.39 : 78,404.41 = 31,321.77 : x
2. Step 2: Convert to fraction form
   56,814.39/78,404.41 = 31,321.77/x
3. Step 3: Cross multiply
   56,814.39x = 78,404.41 × 31,321.77
4. Step 4: Simplify right side
   56,814.39x = 2,455,764,741.60
5. Step 5: Solve for x
   x = 2,455,764,741.60/56,814.39
6. Step 6: Final answer
   x = 43,224.35