Finding the Third Proportional to 147,553 and 316,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,553 : 316,611.50 = 316,611.50 : x
2. Step 2: Convert to fraction form
   147,553/316,611.50 = 316,611.50/x
3. Step 3: Cross multiply
   147,553x = 316,611.50 × 316,611.50
4. Step 4: Simplify right side
   147,553x = 100,242,841,932.25
5. Step 5: Solve for x
   x = 100,242,841,932.25/147,553
6. Step 6: Final answer
   x = 679,368.38