Finding the Fourth Proportional to 957,249, 1,321,003.86 and 521,666.48

Step by Step Solution

1. Step 1: Write the proportion equation
   957,249 : 1,321,003.86 = 521,666.48 : x
2. Step 2: Convert to fraction form
   957,249/1,321,003.86 = 521,666.48/x
3. Step 3: Cross multiply
   957,249x = 1,321,003.86 × 521,666.48
4. Step 4: Simplify right side
   957,249x = 689,123,424,499.26
5. Step 5: Solve for x
   x = 689,123,424,499.26/957,249
6. Step 6: Final answer
   x = 719,899.86