Finding the Fourth Proportional to 111,385.78, 153,678.79 and 68,321.02

Step by Step Solution

1. Step 1: Write the proportion equation
   111,385.78 : 153,678.79 = 68,321.02 : x
2. Step 2: Convert to fraction form
   111,385.78/153,678.79 = 68,321.02/x
3. Step 3: Cross multiply
   111,385.78x = 153,678.79 × 68,321.02
4. Step 4: Simplify right side
   111,385.78x = 10,499,490,916.77
5. Step 5: Solve for x
   x = 10,499,490,916.77/111,385.78
6. Step 6: Final answer
   x = 94,262.40