Finding the Fourth Proportional to 62,911.89, 86,790.19 and 42,487.32

Step by Step Solution

1. Step 1: Write the proportion equation
   62,911.89 : 86,790.19 = 42,487.32 : x
2. Step 2: Convert to fraction form
   62,911.89/86,790.19 = 42,487.32/x
3. Step 3: Cross multiply
   62,911.89x = 86,790.19 × 42,487.32
4. Step 4: Simplify right side
   62,911.89x = 3,687,482,575.39
5. Step 5: Solve for x
   x = 3,687,482,575.39/62,911.89
6. Step 6: Final answer
   x = 58,613.44