Finding the Fourth Proportional to 1,261.59, 1,742.10 and 848.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261.59 : 1,742.10 = 848.79 : x
2. Step 2: Convert to fraction form
   1,261.59/1,742.10 = 848.79/x
3. Step 3: Cross multiply
   1,261.59x = 1,742.10 × 848.79
4. Step 4: Simplify right side
   1,261.59x = 1,478,672.82
5. Step 5: Solve for x
   x = 1,478,672.82/1,261.59
6. Step 6: Final answer
   x = 1,172.07