Finding the Fourth Proportional to 78,445.59, 117,667.35 and 19,281.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,445.59 : 117,667.35 = 19,281.80 : x
2. Step 2: Convert to fraction form
   78,445.59/117,667.35 = 19,281.80/x
3. Step 3: Cross multiply
   78,445.59x = 117,667.35 × 19,281.80
4. Step 4: Simplify right side
   78,445.59x = 2,268,837,720.89
5. Step 5: Solve for x
   x = 2,268,837,720.89/78,445.59
6. Step 6: Final answer
   x = 28,922.44