Finding the Fourth Proportional to 12,957.50, 19,434.71 and 7,623.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.50 : 19,434.71 = 7,623.87 : x
2. Step 2: Convert to fraction form
   12,957.50/19,434.71 = 7,623.87/x
3. Step 3: Cross multiply
   12,957.50x = 19,434.71 × 7,623.87
4. Step 4: Simplify right side
   12,957.50x = 148,167,598.82
5. Step 5: Solve for x
   x = 148,167,598.82/12,957.50
6. Step 6: Final answer
   x = 11,434.89