Finding the Fourth Proportional to 715,496.78, 1,073,250.63 and 210,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   715,496.78 : 1,073,250.63 = 210,066.50 : x
2. Step 2: Convert to fraction form
   715,496.78/1,073,250.63 = 210,066.50/x
3. Step 3: Cross multiply
   715,496.78x = 1,073,250.63 × 210,066.50
4. Step 4: Simplify right side
   715,496.78x = 225,453,998,100.64
5. Step 5: Solve for x
   x = 225,453,998,100.64/715,496.78
6. Step 6: Final answer
   x = 315,101.35