Finding the Fourth Proportional to 622,051.50, 931,287.32 and 557,142.71

Step by Step Solution

1. Step 1: Write the proportion equation
   622,051.50 : 931,287.32 = 557,142.71 : x
2. Step 2: Convert to fraction form
   622,051.50/931,287.32 = 557,142.71/x
3. Step 3: Cross multiply
   622,051.50x = 931,287.32 × 557,142.71
4. Step 4: Simplify right side
   622,051.50x = 518,859,939,034.50
5. Step 5: Solve for x
   x = 518,859,939,034.50/622,051.50
6. Step 6: Final answer
   x = 834,110.91