Finding the Fourth Proportional to 1,099,128.32, 1,648,724.88 and 938,189.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099,128.32 : 1,648,724.88 = 938,189.56 : x
2. Step 2: Convert to fraction form
   1,099,128.32/1,648,724.88 = 938,189.56/x
3. Step 3: Cross multiply
   1,099,128.32x = 1,648,724.88 × 938,189.56
4. Step 4: Simplify right side
   1,099,128.32x = 1,546,816,469,728.25
5. Step 5: Solve for x
   x = 1,546,816,469,728.25/1,099,128.32
6. Step 6: Final answer
   x = 1,407,312.00