Finding the Fourth Proportional to 686,691.27, 947,624.00 and 380,768.18

Step by Step Solution

1. Step 1: Write the proportion equation
   686,691.27 : 947,624.00 = 380,768.18 : x
2. Step 2: Convert to fraction form
   686,691.27/947,624.00 = 380,768.18/x
3. Step 3: Cross multiply
   686,691.27x = 947,624.00 × 380,768.18
4. Step 4: Simplify right side
   686,691.27x = 360,825,059,162.36
5. Step 5: Solve for x
   x = 360,825,059,162.36/686,691.27
6. Step 6: Final answer
   x = 525,454.56