Finding the Fourth Proportional to 1,666,856.71, 2,300,214.99 and 978,517.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666,856.71 : 2,300,214.99 = 978,517.57 : x
2. Step 2: Convert to fraction form
   1,666,856.71/2,300,214.99 = 978,517.57/x
3. Step 3: Cross multiply
   1,666,856.71x = 2,300,214.99 × 978,517.57
4. Step 4: Simplify right side
   1,666,856.71x = 2,250,800,782,492.37
5. Step 5: Solve for x
   x = 2,250,800,782,492.37/1,666,856.71
6. Step 6: Final answer
   x = 1,350,326.50