Finding the Fourth Proportional to 114,561.25, 171,967.59 and 91,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   114,561.25 : 171,967.59 = 91,020.12 : x
2. Step 2: Convert to fraction form
   114,561.25/171,967.59 = 91,020.12/x
3. Step 3: Cross multiply
   114,561.25x = 171,967.59 × 91,020.12
4. Step 4: Simplify right side
   114,561.25x = 15,652,510,677.91
5. Step 5: Solve for x
   x = 15,652,510,677.91/114,561.25
6. Step 6: Final answer
   x = 136,630.06