Finding the Fourth Proportional to 710,564.62, 980,581.72 and 388,274.71

Step by Step Solution

1. Step 1: Write the proportion equation
   710,564.62 : 980,581.72 = 388,274.71 : x
2. Step 2: Convert to fraction form
   710,564.62/980,581.72 = 388,274.71/x
3. Step 3: Cross multiply
   710,564.62x = 980,581.72 × 388,274.71
4. Step 4: Simplify right side
   710,564.62x = 380,735,078,061.39
5. Step 5: Solve for x
   x = 380,735,078,061.39/710,564.62
6. Step 6: Final answer
   x = 535,820.49