Finding the Fourth Proportional to 2,172,847.76, 2,998,670.04 and 1,205,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172,847.76 : 2,998,670.04 = 1,205,978.12 : x
2. Step 2: Convert to fraction form
   2,172,847.76/2,998,670.04 = 1,205,978.12/x
3. Step 3: Cross multiply
   2,172,847.76x = 2,998,670.04 × 1,205,978.12
4. Step 4: Simplify right side
   2,172,847.76x = 3,616,330,457,339.53
5. Step 5: Solve for x
   x = 3,616,330,457,339.53/2,172,847.76
6. Step 6: Final answer
   x = 1,664,327.58