Finding the Fourth Proportional to 1,120,646.34, 1,680,743.52 and 410,431.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120,646.34 : 1,680,743.52 = 410,431.86 : x
2. Step 2: Convert to fraction form
   1,120,646.34/1,680,743.52 = 410,431.86/x
3. Step 3: Cross multiply
   1,120,646.34x = 1,680,743.52 × 410,431.86
4. Step 4: Simplify right side
   1,120,646.34x = 689,830,689,096.55
5. Step 5: Solve for x
   x = 689,830,689,096.55/1,120,646.34
6. Step 6: Final answer
   x = 615,565.02