Finding the Fourth Proportional to 56,603.35, 78,113.34 and 31,112.49

Step by Step Solution

1. Step 1: Write the proportion equation
   56,603.35 : 78,113.34 = 31,112.49 : x
2. Step 2: Convert to fraction form
   56,603.35/78,113.34 = 31,112.49/x
3. Step 3: Cross multiply
   56,603.35x = 78,113.34 × 31,112.49
4. Step 4: Simplify right side
   56,603.35x = 2,430,300,354.05
5. Step 5: Solve for x
   x = 2,430,300,354.05/56,603.35
6. Step 6: Final answer
   x = 42,935.63