Finding the Fourth Proportional to 123,124.96, 169,969.16 and 72,130.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,124.96 : 169,969.16 = 72,130.60 : x
2. Step 2: Convert to fraction form
   123,124.96/169,969.16 = 72,130.60/x
3. Step 3: Cross multiply
   123,124.96x = 169,969.16 × 72,130.60
4. Step 4: Simplify right side
   123,124.96x = 12,259,977,492.30
5. Step 5: Solve for x
   x = 12,259,977,492.30/123,124.96
6. Step 6: Final answer
   x = 99,573.45