Finding the Fourth Proportional to 1,250.78, 1,875.03 and 557.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.78 : 1,875.03 = 557.01 : x
2. Step 2: Convert to fraction form
   1,250.78/1,875.03 = 557.01/x
3. Step 3: Cross multiply
   1,250.78x = 1,875.03 × 557.01
4. Step 4: Simplify right side
   1,250.78x = 1,044,410.46
5. Step 5: Solve for x
   x = 1,044,410.46/1,250.78
6. Step 6: Final answer
   x = 835.01