Finding the Fourth Proportional to 111,709, 154,158.44 and 63,978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,709 : 154,158.44 = 63,978.16 : x
2. Step 2: Convert to fraction form
   111,709/154,158.44 = 63,978.16/x
3. Step 3: Cross multiply
   111,709x = 154,158.44 × 63,978.16
4. Step 4: Simplify right side
   111,709x = 9,862,773,339.67
5. Step 5: Solve for x
   x = 9,862,773,339.67/111,709
6. Step 6: Final answer
   x = 88,289.87