Finding the Fourth Proportional to 58,607.89, 80,986.17 and 42,664.66

Step by Step Solution

1. Step 1: Write the proportion equation
   58,607.89 : 80,986.17 = 42,664.66 : x
2. Step 2: Convert to fraction form
   58,607.89/80,986.17 = 42,664.66/x
3. Step 3: Cross multiply
   58,607.89x = 80,986.17 × 42,664.66
4. Step 4: Simplify right side
   58,607.89x = 3,455,247,407.75
5. Step 5: Solve for x
   x = 3,455,247,407.75/58,607.89
6. Step 6: Final answer
   x = 58,955.33