Finding the Fourth Proportional to 105,279.89, 145,239.62 and 62,813.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,279.89 : 145,239.62 = 62,813.88 : x
2. Step 2: Convert to fraction form
   105,279.89/145,239.62 = 62,813.88/x
3. Step 3: Cross multiply
   105,279.89x = 145,239.62 × 62,813.88
4. Step 4: Simplify right side
   105,279.89x = 9,123,063,747.86
5. Step 5: Solve for x
   x = 9,123,063,747.86/105,279.89
6. Step 6: Final answer
   x = 86,655.34