Finding the Fourth Proportional to 111,475.98, 153,826.70 and 66,146.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111,475.98 : 153,826.70 = 66,146.15 : x
2. Step 2: Convert to fraction form
   111,475.98/153,826.70 = 66,146.15/x
3. Step 3: Cross multiply
   111,475.98x = 153,826.70 × 66,146.15
4. Step 4: Simplify right side
   111,475.98x = 10,175,044,026.04
5. Step 5: Solve for x
   x = 10,175,044,026.04/111,475.98
6. Step 6: Final answer
   x = 91,275.66