Finding the Fourth Proportional to 23,128.34, 31,916.43 and 13,056.93

Step by Step Solution

1. Step 1: Write the proportion equation
   23,128.34 : 31,916.43 = 13,056.93 : x
2. Step 2: Convert to fraction form
   23,128.34/31,916.43 = 13,056.93/x
3. Step 3: Cross multiply
   23,128.34x = 31,916.43 × 13,056.93
4. Step 4: Simplify right side
   23,128.34x = 416,730,592.36
5. Step 5: Solve for x
   x = 416,730,592.36/23,128.34
6. Step 6: Final answer
   x = 18,018.18