Finding the Third Proportional to 143,272.13 and 314,091

Step by Step Solution

1. Step 1: Write the proportion equation
   143,272.13 : 314,091 = 314,091 : x
2. Step 2: Convert to fraction form
   143,272.13/314,091 = 314,091/x
3. Step 3: Cross multiply
   143,272.13x = 314,091 × 314,091
4. Step 4: Simplify right side
   143,272.13x = 98,653,156,281
5. Step 5: Solve for x
   x = 98,653,156,281/143,272.13
6. Step 6: Final answer
   x = 688,571.88