Finding the Fourth Proportional to 12,946.90, 17,868.49 and 7,570.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,946.90 : 17,868.49 = 7,570.98 : x
2. Step 2: Convert to fraction form
   12,946.90/17,868.49 = 7,570.98/x
3. Step 3: Cross multiply
   12,946.90x = 17,868.49 × 7,570.98
4. Step 4: Simplify right side
   12,946.90x = 135,281,980.42
5. Step 5: Solve for x
   x = 135,281,980.42/12,946.90
6. Step 6: Final answer
   x = 10,448.99