Finding the Fourth Proportional to 118,916.14, 164,099.83 and 65,199.90

Step by Step Solution

1. Step 1: Write the proportion equation
   118,916.14 : 164,099.83 = 65,199.90 : x
2. Step 2: Convert to fraction form
   118,916.14/164,099.83 = 65,199.90/x
3. Step 3: Cross multiply
   118,916.14x = 164,099.83 × 65,199.90
4. Step 4: Simplify right side
   118,916.14x = 10,699,292,506.02
5. Step 5: Solve for x
   x = 10,699,292,506.02/118,916.14
6. Step 6: Final answer
   x = 89,973.43