Finding the Fourth Proportional to 78,735.15, 118,068.10 and 28,802.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,735.15 : 118,068.10 = 28,802.30 : x
2. Step 2: Convert to fraction form
   78,735.15/118,068.10 = 28,802.30/x
3. Step 3: Cross multiply
   78,735.15x = 118,068.10 × 28,802.30
4. Step 4: Simplify right side
   78,735.15x = 3,400,632,174.28
5. Step 5: Solve for x
   x = 3,400,632,174.28/78,735.15
6. Step 6: Final answer
   x = 43,190.78