Finding the Fourth Proportional to 86,925.10, 121,870.10 and 86,925.10

Step by Step Solution

1. Step 1: Write the proportion equation
   86,925.10 : 121,870.10 = 86,925.10 : x
2. Step 2: Convert to fraction form
   86,925.10/121,870.10 = 86,925.10/x
3. Step 3: Cross multiply
   86,925.10x = 121,870.10 × 86,925.10
4. Step 4: Simplify right side
   86,925.10x = 10,593,570,629.51
5. Step 5: Solve for x
   x = 10,593,570,629.51/86,925.10
6. Step 6: Final answer
   x = 121,870.10