Finding the Fourth Proportional to 66,139.58, 91,222.59 and 45,986.37

Step by Step Solution

1. Step 1: Write the proportion equation
   66,139.58 : 91,222.59 = 45,986.37 : x
2. Step 2: Convert to fraction form
   66,139.58/91,222.59 = 45,986.37/x
3. Step 3: Cross multiply
   66,139.58x = 91,222.59 × 45,986.37
4. Step 4: Simplify right side
   66,139.58x = 4,194,995,776.10
5. Step 5: Solve for x
   x = 4,194,995,776.10/66,139.58
6. Step 6: Final answer
   x = 63,426.41