Finding the Fourth Proportional to 55,131.59, 76,079.28 and 31,259.87

Step by Step Solution

1. Step 1: Write the proportion equation
   55,131.59 : 76,079.28 = 31,259.87 : x
2. Step 2: Convert to fraction form
   55,131.59/76,079.28 = 31,259.87/x
3. Step 3: Cross multiply
   55,131.59x = 76,079.28 × 31,259.87
4. Step 4: Simplify right side
   55,131.59x = 2,378,228,402.49
5. Step 5: Solve for x
   x = 2,378,228,402.49/55,131.59
6. Step 6: Final answer
   x = 43,137.31