Finding the Fourth Proportional to 99,144, 136,820.88 and 54,432

Step by Step Solution

1. Step 1: Write the proportion equation
   99,144 : 136,820.88 = 54,432 : x
2. Step 2: Convert to fraction form
   99,144/136,820.88 = 54,432/x
3. Step 3: Cross multiply
   99,144x = 136,820.88 × 54,432
4. Step 4: Simplify right side
   99,144x = 7,447,434,140.16
5. Step 5: Solve for x
   x = 7,447,434,140.16/99,144
6. Step 6: Final answer
   x = 75,117.35