Finding the Fourth Proportional to 78,417.63, 117,555.15 and 28,476.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,417.63 : 117,555.15 = 28,476.27 : x
2. Step 2: Convert to fraction form
   78,417.63/117,555.15 = 28,476.27/x
3. Step 3: Cross multiply
   78,417.63x = 117,555.15 × 28,476.27
4. Step 4: Simplify right side
   78,417.63x = 3,347,532,191.29
5. Step 5: Solve for x
   x = 3,347,532,191.29/78,417.63
6. Step 6: Final answer
   x = 42,688.52