Finding the Fourth Proportional to 62,805.89, 86,639.64 and 38,891.05

Step by Step Solution

1. Step 1: Write the proportion equation
   62,805.89 : 86,639.64 = 38,891.05 : x
2. Step 2: Convert to fraction form
   62,805.89/86,639.64 = 38,891.05/x
3. Step 3: Cross multiply
   62,805.89x = 86,639.64 × 38,891.05
4. Step 4: Simplify right side
   62,805.89x = 3,369,506,385.31
5. Step 5: Solve for x
   x = 3,369,506,385.31/62,805.89
6. Step 6: Final answer
   x = 53,649.53