Finding the Fourth Proportional to 78,429.98, 108,233.51 and 42,620.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.98 : 108,233.51 = 42,620.01 : x
2. Step 2: Convert to fraction form
   78,429.98/108,233.51 = 42,620.01/x
3. Step 3: Cross multiply
   78,429.98x = 108,233.51 × 42,620.01
4. Step 4: Simplify right side
   78,429.98x = 4,612,913,065.44
5. Step 5: Solve for x
   x = 4,612,913,065.44/78,429.98
6. Step 6: Final answer
   x = 58,815.69