Finding the Fourth Proportional to 1,174,900.72, 1,621,443.12 and 665,607.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174,900.72 : 1,621,443.12 = 665,607.28 : x
2. Step 2: Convert to fraction form
   1,174,900.72/1,621,443.12 = 665,607.28/x
3. Step 3: Cross multiply
   1,174,900.72x = 1,621,443.12 × 665,607.28
4. Step 4: Simplify right side
   1,174,900.72x = 1,079,244,344,777.91
5. Step 5: Solve for x
   x = 1,079,244,344,777.91/1,174,900.72
6. Step 6: Final answer
   x = 918,583.44