Finding the Fourth Proportional to 48,079.59, 72,113.89 and 13,021.98

Step by Step Solution

1. Step 1: Write the proportion equation
   48,079.59 : 72,113.89 = 13,021.98 : x
2. Step 2: Convert to fraction form
   48,079.59/72,113.89 = 13,021.98/x
3. Step 3: Cross multiply
   48,079.59x = 72,113.89 × 13,021.98
4. Step 4: Simplify right side
   48,079.59x = 939,065,633.30
5. Step 5: Solve for x
   x = 939,065,633.30/48,079.59
6. Step 6: Final answer
   x = 19,531.48