Finding the Fourth Proportional to 111,514.89, 153,820.56 and 66,160.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111,514.89 : 153,820.56 = 66,160.77 : x
2. Step 2: Convert to fraction form
   111,514.89/153,820.56 = 66,160.77/x
3. Step 3: Cross multiply
   111,514.89x = 153,820.56 × 66,160.77
4. Step 4: Simplify right side
   111,514.89x = 10,176,886,691.43
5. Step 5: Solve for x
   x = 10,176,886,691.43/111,514.89
6. Step 6: Final answer
   x = 91,260.34