Finding the Fourth Proportional to 45,642.51, 68,471.86 and 20,681.55

Step by Step Solution

1. Step 1: Write the proportion equation
   45,642.51 : 68,471.86 = 20,681.55 : x
2. Step 2: Convert to fraction form
   45,642.51/68,471.86 = 20,681.55/x
3. Step 3: Cross multiply
   45,642.51x = 68,471.86 × 20,681.55
4. Step 4: Simplify right side
   45,642.51x = 1,416,104,196.18
5. Step 5: Solve for x
   x = 1,416,104,196.18/45,642.51
6. Step 6: Final answer
   x = 31,025.99