Finding the Third Proportional to 178,540,426.50 and 386,875,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   178,540,426.50 : 386,875,171.50 = 386,875,171.50 : x
2. Step 2: Convert to fraction form
   178,540,426.50/386,875,171.50 = 386,875,171.50/x
3. Step 3: Cross multiply
   178,540,426.50x = 386,875,171.50 × 386,875,171.50
4. Step 4: Simplify right side
   178,540,426.50x = 149,672,398,323,154,400
5. Step 5: Solve for x
   x = 149,672,398,323,154,400/178,540,426.50
6. Step 6: Final answer
   x = 838,310,971.12