Finding the Fourth Proportional to 58,018.19, 80,004.29 and 42,942.47

Step by Step Solution

1. Step 1: Write the proportion equation
   58,018.19 : 80,004.29 = 42,942.47 : x
2. Step 2: Convert to fraction form
   58,018.19/80,004.29 = 42,942.47/x
3. Step 3: Cross multiply
   58,018.19x = 80,004.29 × 42,942.47
4. Step 4: Simplify right side
   58,018.19x = 3,435,581,208.46
5. Step 5: Solve for x
   x = 3,435,581,208.46/58,018.19
6. Step 6: Final answer
   x = 59,215.59