Finding the Fourth Proportional to 69,642.42, 96,099.92 and 42,780.59

Step by Step Solution

1. Step 1: Write the proportion equation
   69,642.42 : 96,099.92 = 42,780.59 : x
2. Step 2: Convert to fraction form
   69,642.42/96,099.92 = 42,780.59/x
3. Step 3: Cross multiply
   69,642.42x = 96,099.92 × 42,780.59
4. Step 4: Simplify right side
   69,642.42x = 4,111,211,102.95
5. Step 5: Solve for x
   x = 4,111,211,102.95/69,642.42
6. Step 6: Final answer
   x = 59,033.15