Finding the Fourth Proportional to 680,916, 939,670.56 and 379,116.48

Step by Step Solution

1. Step 1: Write the proportion equation
   680,916 : 939,670.56 = 379,116.48 : x
2. Step 2: Convert to fraction form
   680,916/939,670.56 = 379,116.48/x
3. Step 3: Cross multiply
   680,916x = 939,670.56 × 379,116.48
4. Step 4: Simplify right side
   680,916x = 356,244,595,066.83
5. Step 5: Solve for x
   x = 356,244,595,066.83/680,916
6. Step 6: Final answer
   x = 523,184.35