Finding the Fourth Proportional to 78,573.63, 108,433.90 and 42,765.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,573.63 : 108,433.90 = 42,765.96 : x
2. Step 2: Convert to fraction form
   78,573.63/108,433.90 = 42,765.96/x
3. Step 3: Cross multiply
   78,573.63x = 108,433.90 × 42,765.96
4. Step 4: Simplify right side
   78,573.63x = 4,637,279,830.04
5. Step 5: Solve for x
   x = 4,637,279,830.04/78,573.63
6. Step 6: Final answer
   x = 59,018.27