Finding the Fourth Proportional to 1,356.53, 1,870.83 and 914.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.53 : 1,870.83 = 914.40 : x
2. Step 2: Convert to fraction form
   1,356.53/1,870.83 = 914.40/x
3. Step 3: Cross multiply
   1,356.53x = 1,870.83 × 914.40
4. Step 4: Simplify right side
   1,356.53x = 1,710,686.95
5. Step 5: Solve for x
   x = 1,710,686.95/1,356.53
6. Step 6: Final answer
   x = 1,261.08