Finding the Fourth Proportional to 1,621.18, 2,430.87 and 754.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.18 : 2,430.87 = 754.84 : x
2. Step 2: Convert to fraction form
   1,621.18/2,430.87 = 754.84/x
3. Step 3: Cross multiply
   1,621.18x = 2,430.87 × 754.84
4. Step 4: Simplify right side
   1,621.18x = 1,834,917.91
5. Step 5: Solve for x
   x = 1,834,917.91/1,621.18
6. Step 6: Final answer
   x = 1,131.84