Finding the Fourth Proportional to 111,432.56, 153,779.34 and 61,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111,432.56 : 153,779.34 = 61,131.56 : x
2. Step 2: Convert to fraction form
   111,432.56/153,779.34 = 61,131.56/x
3. Step 3: Cross multiply
   111,432.56x = 153,779.34 × 61,131.56
4. Step 4: Simplify right side
   111,432.56x = 9,400,770,949.97
5. Step 5: Solve for x
   x = 9,400,770,949.97/111,432.56
6. Step 6: Final answer
   x = 84,362.87