Finding the Fourth Proportional to 111,570.78, 153,946 and 66,262.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111,570.78 : 153,946 = 66,262.96 : x
2. Step 2: Convert to fraction form
   111,570.78/153,946 = 66,262.96/x
3. Step 3: Cross multiply
   111,570.78x = 153,946 × 66,262.96
4. Step 4: Simplify right side
   111,570.78x = 10,200,917,640.16
5. Step 5: Solve for x
   x = 10,200,917,640.16/111,570.78
6. Step 6: Final answer
   x = 91,430.01