Finding the Fourth Proportional to 99,114.72, 136,778.40 and 54,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,114.72 : 136,778.40 = 54,402.72 : x
2. Step 2: Convert to fraction form
   99,114.72/136,778.40 = 54,402.72/x
3. Step 3: Cross multiply
   99,114.72x = 136,778.40 × 54,402.72
4. Step 4: Simplify right side
   99,114.72x = 7,441,116,997.25
5. Step 5: Solve for x
   x = 7,441,116,997.25/99,114.72
6. Step 6: Final answer
   x = 75,075.80