Finding the Fourth Proportional to 2,478.51, 3,419.74 and 1,430.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.51 : 3,419.74 = 1,430.57 : x
2. Step 2: Convert to fraction form
   2,478.51/3,419.74 = 1,430.57/x
3. Step 3: Cross multiply
   2,478.51x = 3,419.74 × 1,430.57
4. Step 4: Simplify right side
   2,478.51x = 4,892,177.45
5. Step 5: Solve for x
   x = 4,892,177.45/2,478.51
6. Step 6: Final answer
   x = 1,973.84