Finding the Fourth Proportional to 111,510.89, 153,815.04 and 66,156.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111,510.89 : 153,815.04 = 66,156.77 : x
2. Step 2: Convert to fraction form
   111,510.89/153,815.04 = 66,156.77/x
3. Step 3: Cross multiply
   111,510.89x = 153,815.04 × 66,156.77
4. Step 4: Simplify right side
   111,510.89x = 10,175,906,223.82
5. Step 5: Solve for x
   x = 10,175,906,223.82/111,510.89
6. Step 6: Final answer
   x = 91,254.82