Finding the Fourth Proportional to 71,606.84, 107,410.86 and 21,690.86

Step by Step Solution

1. Step 1: Write the proportion equation
   71,606.84 : 107,410.86 = 21,690.86 : x
2. Step 2: Convert to fraction form
   71,606.84/107,410.86 = 21,690.86/x
3. Step 3: Cross multiply
   71,606.84x = 107,410.86 × 21,690.86
4. Step 4: Simplify right side
   71,606.84x = 2,329,833,389.69
5. Step 5: Solve for x
   x = 2,329,833,389.69/71,606.84
6. Step 6: Final answer
   x = 32,536.47