Finding the Fourth Proportional to 1,089,146.16, 1,633,797.30 and 290,423.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089,146.16 : 1,633,797.30 = 290,423.52 : x
2. Step 2: Convert to fraction form
   1,089,146.16/1,633,797.30 = 290,423.52/x
3. Step 3: Cross multiply
   1,089,146.16x = 1,633,797.30 × 290,423.52
4. Step 4: Simplify right side
   1,089,146.16x = 474,493,162,832.50
5. Step 5: Solve for x
   x = 474,493,162,832.50/1,089,146.16
6. Step 6: Final answer
   x = 435,656.09