Finding the Fourth Proportional to 78,700.56, 118,068.38 and 28,779.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.56 : 118,068.38 = 28,779.55 : x
2. Step 2: Convert to fraction form
   78,700.56/118,068.38 = 28,779.55/x
3. Step 3: Cross multiply
   78,700.56x = 118,068.38 × 28,779.55
4. Step 4: Simplify right side
   78,700.56x = 3,397,955,340.50
5. Step 5: Solve for x
   x = 3,397,955,340.50/78,700.56
6. Step 6: Final answer
   x = 43,175.74