Finding the Third Proportional to 189,111.38 and 404,980.88

Step by Step Solution

1. Step 1: Write the proportion equation
   189,111.38 : 404,980.88 = 404,980.88 : x
2. Step 2: Convert to fraction form
   189,111.38/404,980.88 = 404,980.88/x
3. Step 3: Cross multiply
   189,111.38x = 404,980.88 × 404,980.88
4. Step 4: Simplify right side
   189,111.38x = 164,009,509,115.77
5. Step 5: Solve for x
   x = 164,009,509,115.77/189,111.38
6. Step 6: Final answer
   x = 867,264.11