Finding the Fourth Proportional to 91,441.50, 137,037.71 and 51,479.55

Step by Step Solution

1. Step 1: Write the proportion equation
   91,441.50 : 137,037.71 = 51,479.55 : x
2. Step 2: Convert to fraction form
   91,441.50/137,037.71 = 51,479.55/x
3. Step 3: Cross multiply
   91,441.50x = 137,037.71 × 51,479.55
4. Step 4: Simplify right side
   91,441.50x = 7,054,639,643.83
5. Step 5: Solve for x
   x = 7,054,639,643.83/91,441.50
6. Step 6: Final answer
   x = 77,149.21