Finding the Fourth Proportional to 2,128,518.18, 3,190,004.91 and 864,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,518.18 : 3,190,004.91 = 864,868.50 : x
2. Step 2: Convert to fraction form
   2,128,518.18/3,190,004.91 = 864,868.50/x
3. Step 3: Cross multiply
   2,128,518.18x = 3,190,004.91 × 864,868.50
4. Step 4: Simplify right side
   2,128,518.18x = 2,758,934,761,504.34
5. Step 5: Solve for x
   x = 2,758,934,761,504.34/2,128,518.18
6. Step 6: Final answer
   x = 1,296,176.27