Finding the Fourth Proportional to 123,108.53, 169,852 and 75,312.05

Step by Step Solution

1. Step 1: Write the proportion equation
   123,108.53 : 169,852 = 75,312.05 : x
2. Step 2: Convert to fraction form
   123,108.53/169,852 = 75,312.05/x
3. Step 3: Cross multiply
   123,108.53x = 169,852 × 75,312.05
4. Step 4: Simplify right side
   123,108.53x = 12,791,902,316.60
5. Step 5: Solve for x
   x = 12,791,902,316.60/123,108.53
6. Step 6: Final answer
   x = 103,907.52