Finding the Fourth Proportional to 186,889.89, 257,941.49 and 111,443.25

Step by Step Solution

1. Step 1: Write the proportion equation
   186,889.89 : 257,941.49 = 111,443.25 : x
2. Step 2: Convert to fraction form
   186,889.89/257,941.49 = 111,443.25/x
3. Step 3: Cross multiply
   186,889.89x = 257,941.49 × 111,443.25
4. Step 4: Simplify right side
   186,889.89x = 28,745,837,398.23
5. Step 5: Solve for x
   x = 28,745,837,398.23/186,889.89
6. Step 6: Final answer
   x = 153,811.62