Finding the Fourth Proportional to 1,221,181.34, 1,685,780.82 and 1,057,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,181.34 : 1,685,780.82 = 1,057,185.50 : x
2. Step 2: Convert to fraction form
   1,221,181.34/1,685,780.82 = 1,057,185.50/x
3. Step 3: Cross multiply
   1,221,181.34x = 1,685,780.82 × 1,057,185.50
4. Step 4: Simplify right side
   1,221,181.34x = 1,782,183,039,082.11
5. Step 5: Solve for x
   x = 1,782,183,039,082.11/1,221,181.34
6. Step 6: Final answer
   x = 1,459,392.62