Finding the Fourth Proportional to 78,633.12, 108,510.24 and 42,820.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,633.12 : 108,510.24 = 42,820.99 : x
2. Step 2: Convert to fraction form
   78,633.12/108,510.24 = 42,820.99/x
3. Step 3: Cross multiply
   78,633.12x = 108,510.24 × 42,820.99
4. Step 4: Simplify right side
   78,633.12x = 4,646,515,901.94
5. Step 5: Solve for x
   x = 4,646,515,901.94/78,633.12
6. Step 6: Final answer
   x = 59,091.08