Finding the Fourth Proportional to 1,380,429.46, 1,904,699.82 and 870,836.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380,429.46 : 1,904,699.82 = 870,836.50 : x
2. Step 2: Convert to fraction form
   1,380,429.46/1,904,699.82 = 870,836.50/x
3. Step 3: Cross multiply
   1,380,429.46x = 1,904,699.82 × 870,836.50
4. Step 4: Simplify right side
   1,380,429.46x = 1,658,682,124,799.43
5. Step 5: Solve for x
   x = 1,658,682,124,799.43/1,380,429.46
6. Step 6: Final answer
   x = 1,201,569.64