Finding the Fourth Proportional to 2,075.34, 3,111.52 and 978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.34 : 3,111.52 = 978.63 : x
2. Step 2: Convert to fraction form
   2,075.34/3,111.52 = 978.63/x
3. Step 3: Cross multiply
   2,075.34x = 3,111.52 × 978.63
4. Step 4: Simplify right side
   2,075.34x = 3,045,026.82
5. Step 5: Solve for x
   x = 3,045,026.82/2,075.34
6. Step 6: Final answer
   x = 1,467.24