Finding the Fourth Proportional to 740,142.23, 1,021,404.87 and 434,223.86

Step by Step Solution

1. Step 1: Write the proportion equation
   740,142.23 : 1,021,404.87 = 434,223.86 : x
2. Step 2: Convert to fraction form
   740,142.23/1,021,404.87 = 434,223.86/x
3. Step 3: Cross multiply
   740,142.23x = 1,021,404.87 × 434,223.86
4. Step 4: Simplify right side
   740,142.23x = 443,518,360,167.17
5. Step 5: Solve for x
   x = 443,518,360,167.17/740,142.23
6. Step 6: Final answer
   x = 599,233.97