Finding the Fourth Proportional to 56,767.50, 78,339.15 and 31,617

Step by Step Solution

1. Step 1: Write the proportion equation
   56,767.50 : 78,339.15 = 31,617 : x
2. Step 2: Convert to fraction form
   56,767.50/78,339.15 = 31,617/x
3. Step 3: Cross multiply
   56,767.50x = 78,339.15 × 31,617
4. Step 4: Simplify right side
   56,767.50x = 2,476,848,905.55
5. Step 5: Solve for x
   x = 2,476,848,905.55/56,767.50
6. Step 6: Final answer
   x = 43,631.46