Finding the Fourth Proportional to 111,513.89, 153,819.18 and 66,159.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111,513.89 : 153,819.18 = 66,159.77 : x
2. Step 2: Convert to fraction form
   111,513.89/153,819.18 = 66,159.77/x
3. Step 3: Cross multiply
   111,513.89x = 153,819.18 × 66,159.77
4. Step 4: Simplify right side
   111,513.89x = 10,176,641,570.39
5. Step 5: Solve for x
   x = 10,176,641,570.39/111,513.89
6. Step 6: Final answer
   x = 91,258.96