Finding the Fourth Proportional to 78,118.29, 117,153.27 and 28,191.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,118.29 : 117,153.27 = 28,191.96 : x
2. Step 2: Convert to fraction form
   78,118.29/117,153.27 = 28,191.96/x
3. Step 3: Cross multiply
   78,118.29x = 117,153.27 × 28,191.96
4. Step 4: Simplify right side
   78,118.29x = 3,302,780,301.71
5. Step 5: Solve for x
   x = 3,302,780,301.71/78,118.29
6. Step 6: Final answer
   x = 42,279.22