Finding the Fourth Proportional to 48,089.56, 72,128.76 and 13,031.86

Step by Step Solution

1. Step 1: Write the proportion equation
   48,089.56 : 72,128.76 = 13,031.86 : x
2. Step 2: Convert to fraction form
   48,089.56/72,128.76 = 13,031.86/x
3. Step 3: Cross multiply
   48,089.56x = 72,128.76 × 13,031.86
4. Step 4: Simplify right side
   48,089.56x = 939,971,902.29
5. Step 5: Solve for x
   x = 939,971,902.29/48,089.56
6. Step 6: Final answer
   x = 19,546.28