Finding the Fourth Proportional to 306,554.15, 423,081.56 and 185,691.89

Step by Step Solution

1. Step 1: Write the proportion equation
   306,554.15 : 423,081.56 = 185,691.89 : x
2. Step 2: Convert to fraction form
   306,554.15/423,081.56 = 185,691.89/x
3. Step 3: Cross multiply
   306,554.15x = 423,081.56 × 185,691.89
4. Step 4: Simplify right side
   306,554.15x = 78,562,814,500.55
5. Step 5: Solve for x
   x = 78,562,814,500.55/306,554.15
6. Step 6: Final answer
   x = 256,277.12