Finding the Fourth Proportional to 1,430.72, 2,134.55 and 1,274.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.72 : 2,134.55 = 1,274.78 : x
2. Step 2: Convert to fraction form
   1,430.72/2,134.55 = 1,274.78/x
3. Step 3: Cross multiply
   1,430.72x = 2,134.55 × 1,274.78
4. Step 4: Simplify right side
   1,430.72x = 2,721,070.98
5. Step 5: Solve for x
   x = 2,721,070.98/1,430.72
6. Step 6: Final answer
   x = 1,901.90