Finding the Fourth Proportional to 1,047,496.32, 1,445,504.23 and 640,279.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047,496.32 : 1,445,504.23 = 640,279.98 : x
2. Step 2: Convert to fraction form
   1,047,496.32/1,445,504.23 = 640,279.98/x
3. Step 3: Cross multiply
   1,047,496.32x = 1,445,504.23 × 640,279.98
4. Step 4: Simplify right side
   1,047,496.32x = 925,527,419,474.32
5. Step 5: Solve for x
   x = 925,527,419,474.32/1,047,496.32
6. Step 6: Final answer
   x = 883,561.50