Finding the Fourth Proportional to 123,588.08, 170,460.96 and 81,131.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,588.08 : 170,460.96 = 81,131.12 : x
2. Step 2: Convert to fraction form
   123,588.08/170,460.96 = 81,131.12/x
3. Step 3: Cross multiply
   123,588.08x = 170,460.96 × 81,131.12
4. Step 4: Simplify right side
   123,588.08x = 13,829,688,601.08
5. Step 5: Solve for x
   x = 13,829,688,601.08/123,588.08
6. Step 6: Final answer
   x = 111,901.48