Finding the Fourth Proportional to 91,462.40, 137,208.84 and 31,488.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,462.40 : 137,208.84 = 31,488.56 : x
2. Step 2: Convert to fraction form
   91,462.40/137,208.84 = 31,488.56/x
3. Step 3: Cross multiply
   91,462.40x = 137,208.84 × 31,488.56
4. Step 4: Simplify right side
   91,462.40x = 4,320,508,790.87
5. Step 5: Solve for x
   x = 4,320,508,790.87/91,462.40
6. Step 6: Final answer
   x = 47,238.09