Finding the Fourth Proportional to 72,698.72, 109,060.72 and 28,349.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,698.72 : 109,060.72 = 28,349.60 : x
2. Step 2: Convert to fraction form
   72,698.72/109,060.72 = 28,349.60/x
3. Step 3: Cross multiply
   72,698.72x = 109,060.72 × 28,349.60
4. Step 4: Simplify right side
   72,698.72x = 3,091,827,787.71
5. Step 5: Solve for x
   x = 3,091,827,787.71/72,698.72
6. Step 6: Final answer
   x = 42,529.33