Finding the Fourth Proportional to 1,435.59, 2,136.21 and 1,430.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.59 : 2,136.21 = 1,430.73 : x
2. Step 2: Convert to fraction form
   1,435.59/2,136.21 = 1,430.73/x
3. Step 3: Cross multiply
   1,435.59x = 2,136.21 × 1,430.73
4. Step 4: Simplify right side
   1,435.59x = 3,056,339.73
5. Step 5: Solve for x
   x = 3,056,339.73/1,435.59
6. Step 6: Final answer
   x = 2,128.98