Finding the Fourth Proportional to 1,079,580.29, 1,619,598.78 and 405,667.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079,580.29 : 1,619,598.78 = 405,667.44 : x
2. Step 2: Convert to fraction form
   1,079,580.29/1,619,598.78 = 405,667.44/x
3. Step 3: Cross multiply
   1,079,580.29x = 1,619,598.78 × 405,667.44
4. Step 4: Simplify right side
   1,079,580.29x = 657,018,490,909.72
5. Step 5: Solve for x
   x = 657,018,490,909.72/1,079,580.29
6. Step 6: Final answer
   x = 608,586.97