Finding the Fourth Proportional to 72,915.39, 109,491.75 and 45,012.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,915.39 : 109,491.75 = 45,012.82 : x
2. Step 2: Convert to fraction form
   72,915.39/109,491.75 = 45,012.82/x
3. Step 3: Cross multiply
   72,915.39x = 109,491.75 × 45,012.82
4. Step 4: Simplify right side
   72,915.39x = 4,928,531,886.78
5. Step 5: Solve for x
   x = 4,928,531,886.78/72,915.39
6. Step 6: Final answer
   x = 67,592.48