Finding the Fourth Proportional to 366,978.99, 550,443.72 and 100,717.20

Step by Step Solution

1. Step 1: Write the proportion equation
   366,978.99 : 550,443.72 = 100,717.20 : x
2. Step 2: Convert to fraction form
   366,978.99/550,443.72 = 100,717.20/x
3. Step 3: Cross multiply
   366,978.99x = 550,443.72 × 100,717.20
4. Step 4: Simplify right side
   366,978.99x = 55,439,150,235.98
5. Step 5: Solve for x
   x = 55,439,150,235.98/366,978.99
6. Step 6: Final answer
   x = 151,069.00