Finding the Fourth Proportional to 1,298,450.80, 1,956,539.08 and 1,066,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298,450.80 : 1,956,539.08 = 1,066,978.72 : x
2. Step 2: Convert to fraction form
   1,298,450.80/1,956,539.08 = 1,066,978.72/x
3. Step 3: Cross multiply
   1,298,450.80x = 1,956,539.08 × 1,066,978.72
4. Step 4: Simplify right side
   1,298,450.80x = 2,087,585,566,987.78
5. Step 5: Solve for x
   x = 2,087,585,566,987.78/1,298,450.80
6. Step 6: Final answer
   x = 1,607,750.99