Finding the Fourth Proportional to 91,272.60, 136,921.86 and 28,097.98

Step by Step Solution

1. Step 1: Write the proportion equation
   91,272.60 : 136,921.86 = 28,097.98 : x
2. Step 2: Convert to fraction form
   91,272.60/136,921.86 = 28,097.98/x
3. Step 3: Cross multiply
   91,272.60x = 136,921.86 × 28,097.98
4. Step 4: Simplify right side
   91,272.60x = 3,847,227,683.84
5. Step 5: Solve for x
   x = 3,847,227,683.84/91,272.60
6. Step 6: Final answer
   x = 42,150.96