Finding the Fourth Proportional to 686,498.28, 947,367.58 and 380,573.89

Step by Step Solution

1. Step 1: Write the proportion equation
   686,498.28 : 947,367.58 = 380,573.89 : x
2. Step 2: Convert to fraction form
   686,498.28/947,367.58 = 380,573.89/x
3. Step 3: Cross multiply
   686,498.28x = 947,367.58 × 380,573.89
4. Step 4: Simplify right side
   686,498.28x = 360,543,358,540.78
5. Step 5: Solve for x
   x = 360,543,358,540.78/686,498.28
6. Step 6: Final answer
   x = 525,191.93