Finding the Fourth Proportional to 12,870.77, 19,292.93 and 7,312.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.77 : 19,292.93 = 7,312.24 : x
2. Step 2: Convert to fraction form
   12,870.77/19,292.93 = 7,312.24/x
3. Step 3: Cross multiply
   12,870.77x = 19,292.93 × 7,312.24
4. Step 4: Simplify right side
   12,870.77x = 141,074,534.46
5. Step 5: Solve for x
   x = 141,074,534.46/12,870.77
6. Step 6: Final answer
   x = 10,960.85