Finding the Fourth Proportional to 61,123.73, 91,699.37 and 21,680.78

Step by Step Solution

1. Step 1: Write the proportion equation
   61,123.73 : 91,699.37 = 21,680.78 : x
2. Step 2: Convert to fraction form
   61,123.73/91,699.37 = 21,680.78/x
3. Step 3: Cross multiply
   61,123.73x = 91,699.37 × 21,680.78
4. Step 4: Simplify right side
   61,123.73x = 1,988,113,758.70
5. Step 5: Solve for x
   x = 1,988,113,758.70/61,123.73
6. Step 6: Final answer
   x = 32,526.05