Finding the Fourth Proportional to 307,926.72, 424,703.52 and 212,592.96

Step by Step Solution

1. Step 1: Write the proportion equation
   307,926.72 : 424,703.52 = 212,592.96 : x
2. Step 2: Convert to fraction form
   307,926.72/424,703.52 = 212,592.96/x
3. Step 3: Cross multiply
   307,926.72x = 424,703.52 × 212,592.96
4. Step 4: Simplify right side
   307,926.72x = 90,288,978,439.22
5. Step 5: Solve for x
   x = 90,288,978,439.22/307,926.72
6. Step 6: Final answer
   x = 293,215.80