Finding the Fourth Proportional to 81,123.12, 111,938.82 and 45,308.58

Step by Step Solution

1. Step 1: Write the proportion equation
   81,123.12 : 111,938.82 = 45,308.58 : x
2. Step 2: Convert to fraction form
   81,123.12/111,938.82 = 45,308.58/x
3. Step 3: Cross multiply
   81,123.12x = 111,938.82 × 45,308.58
4. Step 4: Simplify right side
   81,123.12x = 5,071,788,981.08
5. Step 5: Solve for x
   x = 5,071,788,981.08/81,123.12
6. Step 6: Final answer
   x = 62,519.65