Finding the Fourth Proportional to 1,329,685.02, 1,993,148.10 and 619,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329,685.02 : 1,993,148.10 = 619,128.72 : x
2. Step 2: Convert to fraction form
   1,329,685.02/1,993,148.10 = 619,128.72/x
3. Step 3: Cross multiply
   1,329,685.02x = 1,993,148.10 × 619,128.72
4. Step 4: Simplify right side
   1,329,685.02x = 1,234,015,231,923.43
5. Step 5: Solve for x
   x = 1,234,015,231,923.43/1,329,685.02
6. Step 6: Final answer
   x = 928,050.79