Finding the Fourth Proportional to 98,559, 136,035.72 and 56,142.54

Step by Step Solution

1. Step 1: Write the proportion equation
   98,559 : 136,035.72 = 56,142.54 : x
2. Step 2: Convert to fraction form
   98,559/136,035.72 = 56,142.54/x
3. Step 3: Cross multiply
   98,559x = 136,035.72 × 56,142.54
4. Step 4: Simplify right side
   98,559x = 7,637,390,851.53
5. Step 5: Solve for x
   x = 7,637,390,851.53/98,559
6. Step 6: Final answer
   x = 77,490.55