Finding the Fourth Proportional to 81,452.71, 112,407.78 and 45,641.40

Step by Step Solution

1. Step 1: Write the proportion equation
   81,452.71 : 112,407.78 = 45,641.40 : x
2. Step 2: Convert to fraction form
   81,452.71/112,407.78 = 45,641.40/x
3. Step 3: Cross multiply
   81,452.71x = 112,407.78 × 45,641.40
4. Step 4: Simplify right side
   81,452.71x = 5,130,448,199.72
5. Step 5: Solve for x
   x = 5,130,448,199.72/81,452.71
6. Step 6: Final answer
   x = 62,986.83