Finding the Fourth Proportional to 686,737.83, 947,680.72 and 380,809.34

Step by Step Solution

1. Step 1: Write the proportion equation
   686,737.83 : 947,680.72 = 380,809.34 : x
2. Step 2: Convert to fraction form
   686,737.83/947,680.72 = 380,809.34/x
3. Step 3: Cross multiply
   686,737.83x = 947,680.72 × 380,809.34
4. Step 4: Simplify right side
   686,737.83x = 360,885,669,513.93
5. Step 5: Solve for x
   x = 360,885,669,513.93/686,737.83
6. Step 6: Final answer
   x = 525,507.19