Finding the Fourth Proportional to 999,200.50, 1,378,896.72 and 546,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   999,200.50 : 1,378,896.72 = 546,491.50 : x
2. Step 2: Convert to fraction form
   999,200.50/1,378,896.72 = 546,491.50/x
3. Step 3: Cross multiply
   999,200.50x = 1,378,896.72 × 546,491.50
4. Step 4: Simplify right side
   999,200.50x = 753,555,336,857.88
5. Step 5: Solve for x
   x = 753,555,336,857.88/999,200.50
6. Step 6: Final answer
   x = 754,158.29