Finding the Fourth Proportional to 111,910.72, 154,445.52 and 61,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,910.72 : 154,445.52 = 61,618.72 : x
2. Step 2: Convert to fraction form
   111,910.72/154,445.52 = 61,618.72/x
3. Step 3: Cross multiply
   111,910.72x = 154,445.52 × 61,618.72
4. Step 4: Simplify right side
   111,910.72x = 9,516,735,252.13
5. Step 5: Solve for x
   x = 9,516,735,252.13/111,910.72
6. Step 6: Final answer
   x = 85,038.64