Finding the Fourth Proportional to 108,390.72, 149,564.88 and 60,638.88

Step by Step Solution

1. Step 1: Write the proportion equation
   108,390.72 : 149,564.88 = 60,638.88 : x
2. Step 2: Convert to fraction form
   108,390.72/149,564.88 = 60,638.88/x
3. Step 3: Cross multiply
   108,390.72x = 149,564.88 × 60,638.88
4. Step 4: Simplify right side
   108,390.72x = 9,069,446,810.53
5. Step 5: Solve for x
   x = 9,069,446,810.53/108,390.72
6. Step 6: Final answer
   x = 83,673.65