Finding the Third Proportional to 163,380.38 and 358,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,380.38 : 358,978.50 = 358,978.50 : x
2. Step 2: Convert to fraction form
   163,380.38/358,978.50 = 358,978.50/x
3. Step 3: Cross multiply
   163,380.38x = 358,978.50 × 358,978.50
4. Step 4: Simplify right side
   163,380.38x = 128,865,563,462.25
5. Step 5: Solve for x
   x = 128,865,563,462.25/163,380.38
6. Step 6: Final answer
   x = 788,745.67