Finding the Fourth Proportional to 1,113.59, 1,667.55 and 930.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.59 : 1,667.55 = 930.53 : x
2. Step 2: Convert to fraction form
   1,113.59/1,667.55 = 930.53/x
3. Step 3: Cross multiply
   1,113.59x = 1,667.55 × 930.53
4. Step 4: Simplify right side
   1,113.59x = 1,551,705.30
5. Step 5: Solve for x
   x = 1,551,705.30/1,113.59
6. Step 6: Final answer
   x = 1,393.43