Finding the Fourth Proportional to 719,312, 992,650.56 and 401,360

Step by Step Solution

1. Step 1: Write the proportion equation
   719,312 : 992,650.56 = 401,360 : x
2. Step 2: Convert to fraction form
   719,312/992,650.56 = 401,360/x
3. Step 3: Cross multiply
   719,312x = 992,650.56 × 401,360
4. Step 4: Simplify right side
   719,312x = 398,410,228,761.60
5. Step 5: Solve for x
   x = 398,410,228,761.60/719,312
6. Step 6: Final answer
   x = 553,876.80