Finding the Fourth Proportional to 61,112.78, 91,457.76 and 42,266.30

Step by Step Solution

1. Step 1: Write the proportion equation
   61,112.78 : 91,457.76 = 42,266.30 : x
2. Step 2: Convert to fraction form
   61,112.78/91,457.76 = 42,266.30/x
3. Step 3: Cross multiply
   61,112.78x = 91,457.76 × 42,266.30
4. Step 4: Simplify right side
   61,112.78x = 3,865,581,121.49
5. Step 5: Solve for x
   x = 3,865,581,121.49/61,112.78
6. Step 6: Final answer
   x = 63,253.24