Finding the Fourth Proportional to 111,572.10, 153,969.32 and 61,271.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,572.10 : 153,969.32 = 61,271.10 : x
2. Step 2: Convert to fraction form
   111,572.10/153,969.32 = 61,271.10/x
3. Step 3: Cross multiply
   111,572.10x = 153,969.32 × 61,271.10
4. Step 4: Simplify right side
   111,572.10x = 9,433,869,755.83
5. Step 5: Solve for x
   x = 9,433,869,755.83/111,572.10
6. Step 6: Final answer
   x = 84,554.02