Finding the Fourth Proportional to 81,100.79, 111,920.77 and 45,290.84

Step by Step Solution

1. Step 1: Write the proportion equation
   81,100.79 : 111,920.77 = 45,290.84 : x
2. Step 2: Convert to fraction form
   81,100.79/111,920.77 = 45,290.84/x
3. Step 3: Cross multiply
   81,100.79x = 111,920.77 × 45,290.84
4. Step 4: Simplify right side
   81,100.79x = 5,068,985,127.14
5. Step 5: Solve for x
   x = 5,068,985,127.14/81,100.79
6. Step 6: Final answer
   x = 62,502.29