Finding the Fourth Proportional to 1,889.18, 2,606.34 and 1,393.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,889.18 : 2,606.34 = 1,393.00 : x
2. Step 2: Convert to fraction form
   1,889.18/2,606.34 = 1,393.00/x
3. Step 3: Cross multiply
   1,889.18x = 2,606.34 × 1,393.00
4. Step 4: Simplify right side
   1,889.18x = 3,630,618.59
5. Step 5: Solve for x
   x = 3,630,618.59/1,889.18
6. Step 6: Final answer
   x = 1,921.80