Finding the Fourth Proportional to 68,780.42, 94,963.20 and 42,978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   68,780.42 : 94,963.20 = 42,978.32 : x
2. Step 2: Convert to fraction form
   68,780.42/94,963.20 = 42,978.32/x
3. Step 3: Cross multiply
   68,780.42x = 94,963.20 × 42,978.32
4. Step 4: Simplify right side
   68,780.42x = 4,081,358,797.82
5. Step 5: Solve for x
   x = 4,081,358,797.82/68,780.42
6. Step 6: Final answer
   x = 59,338.96