Finding the Fourth Proportional to 1,404.53, 2,105.15 and 1,056.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.53 : 2,105.15 = 1,056.74 : x
2. Step 2: Convert to fraction form
   1,404.53/2,105.15 = 1,056.74/x
3. Step 3: Cross multiply
   1,404.53x = 2,105.15 × 1,056.74
4. Step 4: Simplify right side
   1,404.53x = 2,224,597.51
5. Step 5: Solve for x
   x = 2,224,597.51/1,404.53
6. Step 6: Final answer
   x = 1,583.88