Finding the Fourth Proportional to 48,086.65, 72,129.57 and 13,026.07

Step by Step Solution

1. Step 1: Write the proportion equation
   48,086.65 : 72,129.57 = 13,026.07 : x
2. Step 2: Convert to fraction form
   48,086.65/72,129.57 = 13,026.07/x
3. Step 3: Cross multiply
   48,086.65x = 72,129.57 × 13,026.07
4. Step 4: Simplify right side
   48,086.65x = 939,564,827.89
5. Step 5: Solve for x
   x = 939,564,827.89/48,086.65
6. Step 6: Final answer
   x = 19,539.00