Finding the Fourth Proportional to 78,409.59, 108,205.71 and 42,599.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,409.59 : 108,205.71 = 42,599.91 : x
2. Step 2: Convert to fraction form
   78,409.59/108,205.71 = 42,599.91/x
3. Step 3: Cross multiply
   78,409.59x = 108,205.71 × 42,599.91
4. Step 4: Simplify right side
   78,409.59x = 4,609,553,507.49
5. Step 5: Solve for x
   x = 4,609,553,507.49/78,409.59
6. Step 6: Final answer
   x = 58,788.13