Finding the Fourth Proportional to 111,643.96, 153,914.70 and 89,059.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111,643.96 : 153,914.70 = 89,059.56 : x
2. Step 2: Convert to fraction form
   111,643.96/153,914.70 = 89,059.56/x
3. Step 3: Cross multiply
   111,643.96x = 153,914.70 × 89,059.56
4. Step 4: Simplify right side
   111,643.96x = 13,707,575,459.53
5. Step 5: Solve for x
   x = 13,707,575,459.53/111,643.96
6. Step 6: Final answer
   x = 122,779.37