Finding the Fourth Proportional to 78,147.83, 116,886.84 and 72,475.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,147.83 : 116,886.84 = 72,475.31 : x
2. Step 2: Convert to fraction form
   78,147.83/116,886.84 = 72,475.31/x
3. Step 3: Cross multiply
   78,147.83x = 116,886.84 × 72,475.31
4. Step 4: Simplify right side
   78,147.83x = 8,471,409,379.49
5. Step 5: Solve for x
   x = 8,471,409,379.49/78,147.83
6. Step 6: Final answer
   x = 108,402.36