Finding the Fourth Proportional to 1,978.76, 2,970.38 and 1,248.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.76 : 2,970.38 = 1,248.75 : x
2. Step 2: Convert to fraction form
   1,978.76/2,970.38 = 1,248.75/x
3. Step 3: Cross multiply
   1,978.76x = 2,970.38 × 1,248.75
4. Step 4: Simplify right side
   1,978.76x = 3,709,265.15
5. Step 5: Solve for x
   x = 3,709,265.15/1,978.76
6. Step 6: Final answer
   x = 1,874.54