Finding the Fourth Proportional to 1,953.79, 2,925.18 and 1,221.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,953.79 : 2,925.18 = 1,221.14 : x
2. Step 2: Convert to fraction form
   1,953.79/2,925.18 = 1,221.14/x
3. Step 3: Cross multiply
   1,953.79x = 2,925.18 × 1,221.14
4. Step 4: Simplify right side
   1,953.79x = 3,572,061.62
5. Step 5: Solve for x
   x = 3,572,061.62/1,953.79
6. Step 6: Final answer
   x = 1,828.28