Finding the Fourth Proportional to 2,640,820.34, 3,961,499.03 and 911,465.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640,820.34 : 3,961,499.03 = 911,465.07 : x
2. Step 2: Convert to fraction form
   2,640,820.34/3,961,499.03 = 911,465.07/x
3. Step 3: Cross multiply
   2,640,820.34x = 3,961,499.03 × 911,465.07
4. Step 4: Simplify right side
   2,640,820.34x = 3,610,767,986,126.56
5. Step 5: Solve for x
   x = 3,610,767,986,126.56/2,640,820.34
6. Step 6: Final answer
   x = 1,367,290.28