Finding the Fourth Proportional to 71,686.17, 107,507.40 and 19,088.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,686.17 : 107,507.40 = 19,088.82 : x
2. Step 2: Convert to fraction form
   71,686.17/107,507.40 = 19,088.82/x
3. Step 3: Cross multiply
   71,686.17x = 107,507.40 × 19,088.82
4. Step 4: Simplify right side
   71,686.17x = 2,052,189,407.27
5. Step 5: Solve for x
   x = 2,052,189,407.27/71,686.17
6. Step 6: Final answer
   x = 28,627.41