Finding the Fourth Proportional to 71,345.48, 107,009.72 and 18,759.07

Step by Step Solution

1. Step 1: Write the proportion equation
   71,345.48 : 107,009.72 = 18,759.07 : x
2. Step 2: Convert to fraction form
   71,345.48/107,009.72 = 18,759.07/x
3. Step 3: Cross multiply
   71,345.48x = 107,009.72 × 18,759.07
4. Step 4: Simplify right side
   71,345.48x = 2,007,402,663.89
5. Step 5: Solve for x
   x = 2,007,402,663.89/71,345.48
6. Step 6: Final answer
   x = 28,136.37