Finding the Fourth Proportional to 2,139,508.45, 3,208,081.69 and 878,221.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,508.45 : 3,208,081.69 = 878,221.81 : x
2. Step 2: Convert to fraction form
   2,139,508.45/3,208,081.69 = 878,221.81/x
3. Step 3: Cross multiply
   2,139,508.45x = 3,208,081.69 × 878,221.81
4. Step 4: Simplify right side
   2,139,508.45x = 2,817,407,308,419.66
5. Step 5: Solve for x
   x = 2,817,407,308,419.66/2,139,508.45
6. Step 6: Final answer
   x = 1,316,847.95