Finding the Fourth Proportional to 78,620.17, 108,492.60 and 42,810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,620.17 : 108,492.60 = 42,810.10 : x
2. Step 2: Convert to fraction form
   78,620.17/108,492.60 = 42,810.10/x
3. Step 3: Cross multiply
   78,620.17x = 108,492.60 × 42,810.10
4. Step 4: Simplify right side
   78,620.17x = 4,644,579,055.26
5. Step 5: Solve for x
   x = 4,644,579,055.26/78,620.17
6. Step 6: Final answer
   x = 59,076.18