Finding the Fourth Proportional to 314,788.25, 472,009.23 and 215,061.05

Step by Step Solution

1. Step 1: Write the proportion equation
   314,788.25 : 472,009.23 = 215,061.05 : x
2. Step 2: Convert to fraction form
   314,788.25/472,009.23 = 215,061.05/x
3. Step 3: Cross multiply
   314,788.25x = 472,009.23 × 215,061.05
4. Step 4: Simplify right side
   314,788.25x = 101,510,798,253.45
5. Step 5: Solve for x
   x = 101,510,798,253.45/314,788.25
6. Step 6: Final answer
   x = 322,473.28