Finding the Fourth Proportional to 139,491, 209,328.66 and 65,624.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,491 : 209,328.66 = 65,624.76 : x
2. Step 2: Convert to fraction form
   139,491/209,328.66 = 65,624.76/x
3. Step 3: Cross multiply
   139,491x = 209,328.66 × 65,624.76
4. Step 4: Simplify right side
   139,491x = 13,737,143,073.62
5. Step 5: Solve for x
   x = 13,737,143,073.62/139,491
6. Step 6: Final answer
   x = 98,480.50