Finding the Fourth Proportional to 713,818.88, 1,070,886.72 and 215,146.88

Step by Step Solution

1. Step 1: Write the proportion equation
   713,818.88 : 1,070,886.72 = 215,146.88 : x
2. Step 2: Convert to fraction form
   713,818.88/1,070,886.72 = 215,146.88/x
3. Step 3: Cross multiply
   713,818.88x = 1,070,886.72 × 215,146.88
4. Step 4: Simplify right side
   713,818.88x = 230,397,936,641.43
5. Step 5: Solve for x
   x = 230,397,936,641.43/713,818.88
6. Step 6: Final answer
   x = 322,768.06