Finding the Fourth Proportional to 89,012.49, 122,781.90 and 55,031.37

Step by Step Solution

1. Step 1: Write the proportion equation
   89,012.49 : 122,781.90 = 55,031.37 : x
2. Step 2: Convert to fraction form
   89,012.49/122,781.90 = 55,031.37/x
3. Step 3: Cross multiply
   89,012.49x = 122,781.90 × 55,031.37
4. Step 4: Simplify right side
   89,012.49x = 6,756,856,168.20
5. Step 5: Solve for x
   x = 6,756,856,168.20/89,012.49
6. Step 6: Final answer
   x = 75,909.08