Finding the Fourth Proportional to 100,886.74, 139,190.37 and 65,100.53

Step by Step Solution

1. Step 1: Write the proportion equation
   100,886.74 : 139,190.37 = 65,100.53 : x
2. Step 2: Convert to fraction form
   100,886.74/139,190.37 = 65,100.53/x
3. Step 3: Cross multiply
   100,886.74x = 139,190.37 × 65,100.53
4. Step 4: Simplify right side
   100,886.74x = 9,061,366,857.90
5. Step 5: Solve for x
   x = 9,061,366,857.90/100,886.74
6. Step 6: Final answer
   x = 89,817.22