Finding the Fourth Proportional to 72,311.70, 99,787.23 and 42,097.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,311.70 : 99,787.23 = 42,097.89 : x
2. Step 2: Convert to fraction form
   72,311.70/99,787.23 = 42,097.89/x
3. Step 3: Cross multiply
   72,311.70x = 99,787.23 × 42,097.89
4. Step 4: Simplify right side
   72,311.70x = 4,200,831,831.94
5. Step 5: Solve for x
   x = 4,200,831,831.94/72,311.70
6. Step 6: Final answer
   x = 58,093.39