Finding the Fourth Proportional to 58,901.88, 81,172.62 and 42,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   58,901.88 : 81,172.62 = 42,105.72 : x
2. Step 2: Convert to fraction form
   58,901.88/81,172.62 = 42,105.72/x
3. Step 3: Cross multiply
   58,901.88x = 81,172.62 × 42,105.72
4. Step 4: Simplify right side
   58,901.88x = 3,417,831,609.39
5. Step 5: Solve for x
   x = 3,417,831,609.39/58,901.88
6. Step 6: Final answer
   x = 58,025.85