Finding the Fourth Proportional to 78,443.34, 117,663.99 and 19,279.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,443.34 : 117,663.99 = 19,279.53 : x
2. Step 2: Convert to fraction form
   78,443.34/117,663.99 = 19,279.53/x
3. Step 3: Cross multiply
   78,443.34x = 117,663.99 × 19,279.53
4. Step 4: Simplify right side
   78,443.34x = 2,268,506,425.12
5. Step 5: Solve for x
   x = 2,268,506,425.12/78,443.34
6. Step 6: Final answer
   x = 28,919.04