Finding the Fourth Proportional to 123,870.94, 170,994.18 and 83,639.14

Step by Step Solution

1. Step 1: Write the proportion equation
   123,870.94 : 170,994.18 = 83,639.14 : x
2. Step 2: Convert to fraction form
   123,870.94/170,994.18 = 83,639.14/x
3. Step 3: Cross multiply
   123,870.94x = 170,994.18 × 83,639.14
4. Step 4: Simplify right side
   123,870.94x = 14,301,806,160.21
5. Step 5: Solve for x
   x = 14,301,806,160.21/123,870.94
6. Step 6: Final answer
   x = 115,457.32