Finding the Fourth Proportional to 13,905.59, 19,191.11 and 7,938.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,905.59 : 19,191.11 = 7,938.18 : x
2. Step 2: Convert to fraction form
   13,905.59/19,191.11 = 7,938.18/x
3. Step 3: Cross multiply
   13,905.59x = 19,191.11 × 7,938.18
4. Step 4: Simplify right side
   13,905.59x = 152,342,445.89
5. Step 5: Solve for x
   x = 152,342,445.89/13,905.59
6. Step 6: Final answer
   x = 10,955.49