Finding the Fourth Proportional to 1,101.02, 1,517.80 and 838.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.02 : 1,517.80 = 838.58 : x
2. Step 2: Convert to fraction form
   1,101.02/1,517.80 = 838.58/x
3. Step 3: Cross multiply
   1,101.02x = 1,517.80 × 838.58
4. Step 4: Simplify right side
   1,101.02x = 1,272,796.72
5. Step 5: Solve for x
   x = 1,272,796.72/1,101.02
6. Step 6: Final answer
   x = 1,156.02