Finding the Fourth Proportional to 56,678.88, 78,217.31 and 31,528.38

Step by Step Solution

1. Step 1: Write the proportion equation
   56,678.88 : 78,217.31 = 31,528.38 : x
2. Step 2: Convert to fraction form
   56,678.88/78,217.31 = 31,528.38/x
3. Step 3: Cross multiply
   56,678.88x = 78,217.31 × 31,528.38
4. Step 4: Simplify right side
   56,678.88x = 2,466,065,072.26
5. Step 5: Solve for x
   x = 2,466,065,072.26/56,678.88
6. Step 6: Final answer
   x = 43,509.42