Finding the Fourth Proportional to 109,002.96, 150,430.28 and 72,641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   109,002.96 : 150,430.28 = 72,641.25 : x
2. Step 2: Convert to fraction form
   109,002.96/150,430.28 = 72,641.25/x
3. Step 3: Cross multiply
   109,002.96x = 150,430.28 × 72,641.25
4. Step 4: Simplify right side
   109,002.96x = 10,927,443,213.84
5. Step 5: Solve for x
   x = 10,927,443,213.84/109,002.96
6. Step 6: Final answer
   x = 100,249.05