Finding the Fourth Proportional to 78,415.10, 108,213.51 and 42,605.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,415.10 : 108,213.51 = 42,605.18 : x
2. Step 2: Convert to fraction form
   78,415.10/108,213.51 = 42,605.18/x
3. Step 3: Cross multiply
   78,415.10x = 108,213.51 × 42,605.18
4. Step 4: Simplify right side
   78,415.10x = 4,610,456,071.98
5. Step 5: Solve for x
   x = 4,610,456,071.98/78,415.10
6. Step 6: Final answer
   x = 58,795.51