Finding the Fourth Proportional to 1,028,314.86, 1,418,905.50 and 646,071

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028,314.86 : 1,418,905.50 = 646,071 : x
2. Step 2: Convert to fraction form
   1,028,314.86/1,418,905.50 = 646,071/x
3. Step 3: Cross multiply
   1,028,314.86x = 1,418,905.50 × 646,071
4. Step 4: Simplify right side
   1,028,314.86x = 916,713,695,290.50
5. Step 5: Solve for x
   x = 916,713,695,290.50/1,028,314.86
6. Step 6: Final answer
   x = 891,471.80