Finding the Fourth Proportional to 56,861.39, 78,467.54 and 31,370.09

Step by Step Solution

1. Step 1: Write the proportion equation
   56,861.39 : 78,467.54 = 31,370.09 : x
2. Step 2: Convert to fraction form
   56,861.39/78,467.54 = 31,370.09/x
3. Step 3: Cross multiply
   56,861.39x = 78,467.54 × 31,370.09
4. Step 4: Simplify right side
   56,861.39x = 2,461,533,242.69
5. Step 5: Solve for x
   x = 2,461,533,242.69/56,861.39
6. Step 6: Final answer
   x = 43,290.06