Finding the Fourth Proportional to 100,907.96, 139,253 and 58,491.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100,907.96 : 139,253 = 58,491.10 : x
2. Step 2: Convert to fraction form
   100,907.96/139,253 = 58,491.10/x
3. Step 3: Cross multiply
   100,907.96x = 139,253 × 58,491.10
4. Step 4: Simplify right side
   100,907.96x = 8,145,061,148.30
5. Step 5: Solve for x
   x = 8,145,061,148.30/100,907.96
6. Step 6: Final answer
   x = 80,717.73