Finding the Fourth Proportional to 56,830.41, 78,431.27 and 31,679.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,830.41 : 78,431.27 = 31,679.37 : x
2. Step 2: Convert to fraction form
   56,830.41/78,431.27 = 31,679.37/x
3. Step 3: Cross multiply
   56,830.41x = 78,431.27 × 31,679.37
4. Step 4: Simplify right side
   56,830.41x = 2,484,653,063.50
5. Step 5: Solve for x
   x = 2,484,653,063.50/56,830.41
6. Step 6: Final answer
   x = 43,720.48