Finding the Fourth Proportional to 2,385.48, 3,580.30 and 1,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.48 : 3,580.30 = 1,275.78 : x
2. Step 2: Convert to fraction form
   2,385.48/3,580.30 = 1,275.78/x
3. Step 3: Cross multiply
   2,385.48x = 3,580.30 × 1,275.78
4. Step 4: Simplify right side
   2,385.48x = 4,567,659.95
5. Step 5: Solve for x
   x = 4,567,659.95/2,385.48
6. Step 6: Final answer
   x = 1,914.78