Finding the Fourth Proportional to 1,385.00, 1,911.56 and 900.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.00 : 1,911.56 = 900.07 : x
2. Step 2: Convert to fraction form
   1,385.00/1,911.56 = 900.07/x
3. Step 3: Cross multiply
   1,385.00x = 1,911.56 × 900.07
4. Step 4: Simplify right side
   1,385.00x = 1,720,526.00
5. Step 5: Solve for x
   x = 1,720,526.00/1,385.00
6. Step 6: Final answer
   x = 1,242.25