Finding the Fourth Proportional to 1,673.76, 2,310.32 and 975.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,673.76 : 2,310.32 = 975.72 : x
2. Step 2: Convert to fraction form
   1,673.76/2,310.32 = 975.72/x
3. Step 3: Cross multiply
   1,673.76x = 2,310.32 × 975.72
4. Step 4: Simplify right side
   1,673.76x = 2,254,225.43
5. Step 5: Solve for x
   x = 2,254,225.43/1,673.76
6. Step 6: Final answer
   x = 1,346.80