Finding the Fourth Proportional to 1,048,559.10, 1,570,505.85 and 861,935.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048,559.10 : 1,570,505.85 = 861,935.10 : x
2. Step 2: Convert to fraction form
   1,048,559.10/1,570,505.85 = 861,935.10/x
3. Step 3: Cross multiply
   1,048,559.10x = 1,570,505.85 × 861,935.10
4. Step 4: Simplify right side
   1,048,559.10x = 1,353,674,116,870.34
5. Step 5: Solve for x
   x = 1,353,674,116,870.34/1,048,559.10
6. Step 6: Final answer
   x = 1,290,985.04