Finding the Fourth Proportional to 1,123,407.20, 1,683,037.20 and 1,048,757.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,407.20 : 1,683,037.20 = 1,048,757.60 : x
2. Step 2: Convert to fraction form
   1,123,407.20/1,683,037.20 = 1,048,757.60/x
3. Step 3: Cross multiply
   1,123,407.20x = 1,683,037.20 × 1,048,757.60
4. Step 4: Simplify right side
   1,123,407.20x = 1,765,098,054,582.72
5. Step 5: Solve for x
   x = 1,765,098,054,582.72/1,123,407.20
6. Step 6: Final answer
   x = 1,571,200.59