Finding the Fourth Proportional to 1,048,448.10, 1,570,339.35 and 861,824.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048,448.10 : 1,570,339.35 = 861,824.10 : x
2. Step 2: Convert to fraction form
   1,048,448.10/1,570,339.35 = 861,824.10/x
3. Step 3: Cross multiply
   1,048,448.10x = 1,570,339.35 × 861,824.10
4. Step 4: Simplify right side
   1,048,448.10x = 1,353,356,297,008.34
5. Step 5: Solve for x
   x = 1,353,356,297,008.34/1,048,448.10
6. Step 6: Final answer
   x = 1,290,818.59