Finding the Fourth Proportional to 78,321.63, 108,080.96 and 42,510.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.63 : 108,080.96 = 42,510.87 : x
2. Step 2: Convert to fraction form
   78,321.63/108,080.96 = 42,510.87/x
3. Step 3: Cross multiply
   78,321.63x = 108,080.96 × 42,510.87
4. Step 4: Simplify right side
   78,321.63x = 4,594,615,640.04
5. Step 5: Solve for x
   x = 4,594,615,640.04/78,321.63
6. Step 6: Final answer
   x = 58,663.43