Finding the Fourth Proportional to 1,430.10, 2,142.52 and 1,200.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.10 : 2,142.52 = 1,200.47 : x
2. Step 2: Convert to fraction form
   1,430.10/2,142.52 = 1,200.47/x
3. Step 3: Cross multiply
   1,430.10x = 2,142.52 × 1,200.47
4. Step 4: Simplify right side
   1,430.10x = 2,572,017.27
5. Step 5: Solve for x
   x = 2,572,017.27/1,430.10
6. Step 6: Final answer
   x = 1,798.49