Finding the Fourth Proportional to 2,073.35, 3,109.95 and 978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.35 : 3,109.95 = 978.50 : x
2. Step 2: Convert to fraction form
   2,073.35/3,109.95 = 978.50/x
3. Step 3: Cross multiply
   2,073.35x = 3,109.95 × 978.50
4. Step 4: Simplify right side
   2,073.35x = 3,043,070.53
5. Step 5: Solve for x
   x = 3,043,070.53/2,073.35
6. Step 6: Final answer
   x = 1,467.71