Finding the Fourth Proportional to 1,397.02, 1,927.91 and 807.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.02 : 1,927.91 = 807.58 : x
2. Step 2: Convert to fraction form
   1,397.02/1,927.91 = 807.58/x
3. Step 3: Cross multiply
   1,397.02x = 1,927.91 × 807.58
4. Step 4: Simplify right side
   1,397.02x = 1,556,941.56
5. Step 5: Solve for x
   x = 1,556,941.56/1,397.02
6. Step 6: Final answer
   x = 1,114.47