Finding the Fourth Proportional to 111,570.32, 153,969.72 and 61,270.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,570.32 : 153,969.72 = 61,270.40 : x
2. Step 2: Convert to fraction form
   111,570.32/153,969.72 = 61,270.40/x
3. Step 3: Cross multiply
   111,570.32x = 153,969.72 × 61,270.40
4. Step 4: Simplify right side
   111,570.32x = 9,433,786,332.29
5. Step 5: Solve for x
   x = 9,433,786,332.29/111,570.32
6. Step 6: Final answer
   x = 84,554.62