Finding the Fourth Proportional to 1,780.50, 2,451.27 and 1,547.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.50 : 2,451.27 = 1,547.55 : x
2. Step 2: Convert to fraction form
   1,780.50/2,451.27 = 1,547.55/x
3. Step 3: Cross multiply
   1,780.50x = 2,451.27 × 1,547.55
4. Step 4: Simplify right side
   1,780.50x = 3,793,462.89
5. Step 5: Solve for x
   x = 3,793,462.89/1,780.50
6. Step 6: Final answer
   x = 2,130.56