Finding the Fourth Proportional to 1,419.98, 2,126.38 and 1,188.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.98 : 2,126.38 = 1,188.30 : x
2. Step 2: Convert to fraction form
   1,419.98/2,126.38 = 1,188.30/x
3. Step 3: Cross multiply
   1,419.98x = 2,126.38 × 1,188.30
4. Step 4: Simplify right side
   1,419.98x = 2,526,763.30
5. Step 5: Solve for x
   x = 2,526,763.30/1,419.98
6. Step 6: Final answer
   x = 1,779.44