Finding the Fourth Proportional to 111,980.01, 154,689.14 and 77,971.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111,980.01 : 154,689.14 = 77,971.48 : x
2. Step 2: Convert to fraction form
   111,980.01/154,689.14 = 77,971.48/x
3. Step 3: Cross multiply
   111,980.01x = 154,689.14 × 77,971.48
4. Step 4: Simplify right side
   111,980.01x = 12,061,340,993.93
5. Step 5: Solve for x
   x = 12,061,340,993.93/111,980.01
6. Step 6: Final answer
   x = 107,709.77