Finding the Fourth Proportional to 1,288,150.32, 1,929,235.59 and 1,243,311.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288,150.32 : 1,929,235.59 = 1,243,311.30 : x
2. Step 2: Convert to fraction form
   1,288,150.32/1,929,235.59 = 1,243,311.30/x
3. Step 3: Cross multiply
   1,288,150.32x = 1,929,235.59 × 1,243,311.30
4. Step 4: Simplify right side
   1,288,150.32x = 2,398,640,409,409.17
5. Step 5: Solve for x
   x = 2,398,640,409,409.17/1,288,150.32
6. Step 6: Final answer
   x = 1,862,081.13