Finding the Fourth Proportional to 111,978.64, 154,528.68 and 61,682.32

Step by Step Solution

1. Step 1: Write the proportion equation
   111,978.64 : 154,528.68 = 61,682.32 : x
2. Step 2: Convert to fraction form
   111,978.64/154,528.68 = 61,682.32/x
3. Step 3: Cross multiply
   111,978.64x = 154,528.68 × 61,682.32
4. Step 4: Simplify right side
   111,978.64x = 9,531,687,488.94
5. Step 5: Solve for x
   x = 9,531,687,488.94/111,978.64
6. Step 6: Final answer
   x = 85,120.59