Finding the Fourth Proportional to 99,200.28, 136,897.56 and 53,878.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,200.28 : 136,897.56 = 53,878.80 : x
2. Step 2: Convert to fraction form
   99,200.28/136,897.56 = 53,878.80/x
3. Step 3: Cross multiply
   99,200.28x = 136,897.56 × 53,878.80
4. Step 4: Simplify right side
   99,200.28x = 7,375,876,255.73
5. Step 5: Solve for x
   x = 7,375,876,255.73/99,200.28
6. Step 6: Final answer
   x = 74,353.38