Finding the Fourth Proportional to 102,544, 141,510.72 and 55,440

Step by Step Solution

1. Step 1: Write the proportion equation
   102,544 : 141,510.72 = 55,440 : x
2. Step 2: Convert to fraction form
   102,544/141,510.72 = 55,440/x
3. Step 3: Cross multiply
   102,544x = 141,510.72 × 55,440
4. Step 4: Simplify right side
   102,544x = 7,845,354,316.80
5. Step 5: Solve for x
   x = 7,845,354,316.80/102,544
6. Step 6: Final answer
   x = 76,507.20