Finding the Fourth Proportional to 78,701.56, 118,069.88 and 28,780.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,701.56 : 118,069.88 = 28,780.55 : x
2. Step 2: Convert to fraction form
   78,701.56/118,069.88 = 28,780.55/x
3. Step 3: Cross multiply
   78,701.56x = 118,069.88 × 28,780.55
4. Step 4: Simplify right side
   78,701.56x = 3,398,116,084.83
5. Step 5: Solve for x
   x = 3,398,116,084.83/78,701.56
6. Step 6: Final answer
   x = 43,177.24