Finding the Fourth Proportional to 1,430.47, 1,974.63 and 933.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.47 : 1,974.63 = 933.55 : x
2. Step 2: Convert to fraction form
   1,430.47/1,974.63 = 933.55/x
3. Step 3: Cross multiply
   1,430.47x = 1,974.63 × 933.55
4. Step 4: Simplify right side
   1,430.47x = 1,843,415.84
5. Step 5: Solve for x
   x = 1,843,415.84/1,430.47
6. Step 6: Final answer
   x = 1,288.68