Finding the Fourth Proportional to 2,087,010.78, 3,130,363.05 and 666,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087,010.78 : 3,130,363.05 = 666,685.50 : x
2. Step 2: Convert to fraction form
   2,087,010.78/3,130,363.05 = 666,685.50/x
3. Step 3: Cross multiply
   2,087,010.78x = 3,130,363.05 × 666,685.50
4. Step 4: Simplify right side
   2,087,010.78x = 2,086,967,655,170.78
5. Step 5: Solve for x
   x = 2,086,967,655,170.78/2,087,010.78
6. Step 6: Final answer
   x = 999,979.34