Finding the Fourth Proportional to 1,913.76, 2,641.20 and 1,167.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.76 : 2,641.20 = 1,167.84 : x
2. Step 2: Convert to fraction form
   1,913.76/2,641.20 = 1,167.84/x
3. Step 3: Cross multiply
   1,913.76x = 2,641.20 × 1,167.84
4. Step 4: Simplify right side
   1,913.76x = 3,084,499.01
5. Step 5: Solve for x
   x = 3,084,499.01/1,913.76
6. Step 6: Final answer
   x = 1,611.75