Finding the Fourth Proportional to 111,892.78, 154,411.68 and 61,591.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111,892.78 : 154,411.68 = 61,591.78 : x
2. Step 2: Convert to fraction form
   111,892.78/154,411.68 = 61,591.78/x
3. Step 3: Cross multiply
   111,892.78x = 154,411.68 × 61,591.78
4. Step 4: Simplify right side
   111,892.78x = 9,510,490,223.99
5. Step 5: Solve for x
   x = 9,510,490,223.99/111,892.78
6. Step 6: Final answer
   x = 84,996.46