Finding the Fourth Proportional to 1,047.18, 1,445.61 and 707.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.18 : 1,445.61 = 707.10 : x
2. Step 2: Convert to fraction form
   1,047.18/1,445.61 = 707.10/x
3. Step 3: Cross multiply
   1,047.18x = 1,445.61 × 707.10
4. Step 4: Simplify right side
   1,047.18x = 1,022,190.83
5. Step 5: Solve for x
   x = 1,022,190.83/1,047.18
6. Step 6: Final answer
   x = 976.14