Finding the Fourth Proportional to 1,112,317.89, 1,668,973.09 and 512,957.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112,317.89 : 1,668,973.09 = 512,957.31 : x
2. Step 2: Convert to fraction form
   1,112,317.89/1,668,973.09 = 512,957.31/x
3. Step 3: Cross multiply
   1,112,317.89x = 1,668,973.09 × 512,957.31
4. Step 4: Simplify right side
   1,112,317.89x = 856,111,946,708.79
5. Step 5: Solve for x
   x = 856,111,946,708.79/1,112,317.89
6. Step 6: Final answer
   x = 769,664.82