Finding the Fourth Proportional to 423,061.89, 634,595.03 and 142,581.57

Step by Step Solution

1. Step 1: Write the proportion equation
   423,061.89 : 634,595.03 = 142,581.57 : x
2. Step 2: Convert to fraction form
   423,061.89/634,595.03 = 142,581.57/x
3. Step 3: Cross multiply
   423,061.89x = 634,595.03 × 142,581.57
4. Step 4: Simplify right side
   423,061.89x = 90,481,554,978.69
5. Step 5: Solve for x
   x = 90,481,554,978.69/423,061.89
6. Step 6: Final answer
   x = 213,873.09