Finding the Fourth Proportional to 78,321.04, 108,081.32 and 42,511.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.04 : 108,081.32 = 42,511.12 : x
2. Step 2: Convert to fraction form
   78,321.04/108,081.32 = 42,511.12/x
3. Step 3: Cross multiply
   78,321.04x = 108,081.32 × 42,511.12
4. Step 4: Simplify right side
   78,321.04x = 4,594,657,964.28
5. Step 5: Solve for x
   x = 4,594,657,964.28/78,321.04
6. Step 6: Final answer
   x = 58,664.41