Finding the Fourth Proportional to 1,501.38, 2,071.71 and 978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.38 : 2,071.71 = 978.12 : x
2. Step 2: Convert to fraction form
   1,501.38/2,071.71 = 978.12/x
3. Step 3: Cross multiply
   1,501.38x = 2,071.71 × 978.12
4. Step 4: Simplify right side
   1,501.38x = 2,026,380.99
5. Step 5: Solve for x
   x = 2,026,380.99/1,501.38
6. Step 6: Final answer
   x = 1,349.68