Finding the Fourth Proportional to 78,699.30, 118,060.56 and 28,767.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,699.30 : 118,060.56 = 28,767.72 : x
2. Step 2: Convert to fraction form
   78,699.30/118,060.56 = 28,767.72/x
3. Step 3: Cross multiply
   78,699.30x = 118,060.56 × 28,767.72
4. Step 4: Simplify right side
   78,699.30x = 3,396,333,133.12
5. Step 5: Solve for x
   x = 3,396,333,133.12/78,699.30
6. Step 6: Final answer
   x = 43,155.82