Finding the Fourth Proportional to 78,939.32, 108,899.71 and 45,385.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,939.32 : 108,899.71 = 45,385.88 : x
2. Step 2: Convert to fraction form
   78,939.32/108,899.71 = 45,385.88/x
3. Step 3: Cross multiply
   78,939.32x = 108,899.71 × 45,385.88
4. Step 4: Simplify right side
   78,939.32x = 4,942,508,512.13
5. Step 5: Solve for x
   x = 4,942,508,512.13/78,939.32
6. Step 6: Final answer
   x = 62,611.49