Finding the Fourth Proportional to 684,003.98, 1,026,116.22 and 210,688.88

Step by Step Solution

1. Step 1: Write the proportion equation
   684,003.98 : 1,026,116.22 = 210,688.88 : x
2. Step 2: Convert to fraction form
   684,003.98/1,026,116.22 = 210,688.88/x
3. Step 3: Cross multiply
   684,003.98x = 1,026,116.22 × 210,688.88
4. Step 4: Simplify right side
   684,003.98x = 216,191,272,011.05
5. Step 5: Solve for x
   x = 216,191,272,011.05/684,003.98
6. Step 6: Final answer
   x = 316,067.27