Finding the Third Proportional to 278,071.50 and 607,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   278,071.50 : 607,111.50 = 607,111.50 : x
2. Step 2: Convert to fraction form
   278,071.50/607,111.50 = 607,111.50/x
3. Step 3: Cross multiply
   278,071.50x = 607,111.50 × 607,111.50
4. Step 4: Simplify right side
   278,071.50x = 368,584,373,432.25
5. Step 5: Solve for x
   x = 368,584,373,432.25/278,071.50
6. Step 6: Final answer
   x = 1,325,502.16