Finding the Fourth Proportional to 1,056.15, 1,456.06 and 790.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.15 : 1,456.06 = 790.98 : x
2. Step 2: Convert to fraction form
   1,056.15/1,456.06 = 790.98/x
3. Step 3: Cross multiply
   1,056.15x = 1,456.06 × 790.98
4. Step 4: Simplify right side
   1,056.15x = 1,151,714.34
5. Step 5: Solve for x
   x = 1,151,714.34/1,056.15
6. Step 6: Final answer
   x = 1,090.48