Finding the Fourth Proportional to 1,930.34, 2,663.89 and 1,173.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.34 : 2,663.89 = 1,173.90 : x
2. Step 2: Convert to fraction form
   1,930.34/2,663.89 = 1,173.90/x
3. Step 3: Cross multiply
   1,930.34x = 2,663.89 × 1,173.90
4. Step 4: Simplify right side
   1,930.34x = 3,127,140.47
5. Step 5: Solve for x
   x = 3,127,140.47/1,930.34
6. Step 6: Final answer
   x = 1,619.99