Finding the Third Proportional to 231,939 and 358,384.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,939 : 358,384.50 = 358,384.50 : x
2. Step 2: Convert to fraction form
   231,939/358,384.50 = 358,384.50/x
3. Step 3: Cross multiply
   231,939x = 358,384.50 × 358,384.50
4. Step 4: Simplify right side
   231,939x = 128,439,449,840.25
5. Step 5: Solve for x
   x = 128,439,449,840.25/231,939
6. Step 6: Final answer
   x = 553,763.92