Finding the Fourth Proportional to 1,376.99, 1,901.79 and 934.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.99 : 1,901.79 = 934.12 : x
2. Step 2: Convert to fraction form
   1,376.99/1,901.79 = 934.12/x
3. Step 3: Cross multiply
   1,376.99x = 1,901.79 × 934.12
4. Step 4: Simplify right side
   1,376.99x = 1,776,495.32
5. Step 5: Solve for x
   x = 1,776,495.32/1,376.99
6. Step 6: Final answer
   x = 1,290.13