Finding the Fourth Proportional to 78,060.18, 107,718.98 and 45,790.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,060.18 : 107,718.98 = 45,790.31 : x
2. Step 2: Convert to fraction form
   78,060.18/107,718.98 = 45,790.31/x
3. Step 3: Cross multiply
   78,060.18x = 107,718.98 × 45,790.31
4. Step 4: Simplify right side
   78,060.18x = 4,932,485,591.82
5. Step 5: Solve for x
   x = 4,932,485,591.82/78,060.18
6. Step 6: Final answer
   x = 63,188.24