Finding the Fourth Proportional to 53,667.74, 80,559.93 and 45,386.30

Step by Step Solution

1. Step 1: Write the proportion equation
   53,667.74 : 80,559.93 = 45,386.30 : x
2. Step 2: Convert to fraction form
   53,667.74/80,559.93 = 45,386.30/x
3. Step 3: Cross multiply
   53,667.74x = 80,559.93 × 45,386.30
4. Step 4: Simplify right side
   53,667.74x = 3,656,317,150.96
5. Step 5: Solve for x
   x = 3,656,317,150.96/53,667.74
6. Step 6: Final answer
   x = 68,128.77