Finding the Fourth Proportional to 116,406.96, 174,662.28 and 60,990

Step by Step Solution

1. Step 1: Write the proportion equation
   116,406.96 : 174,662.28 = 60,990 : x
2. Step 2: Convert to fraction form
   116,406.96/174,662.28 = 60,990/x
3. Step 3: Cross multiply
   116,406.96x = 174,662.28 × 60,990
4. Step 4: Simplify right side
   116,406.96x = 10,652,652,457.20
5. Step 5: Solve for x
   x = 10,652,652,457.20/116,406.96
6. Step 6: Final answer
   x = 91,512.16