Finding the Fourth Proportional to 91,300.14, 136,964.93 and 28,120.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,300.14 : 136,964.93 = 28,120.25 : x
2. Step 2: Convert to fraction form
   91,300.14/136,964.93 = 28,120.25/x
3. Step 3: Cross multiply
   91,300.14x = 136,964.93 × 28,120.25
4. Step 4: Simplify right side
   91,300.14x = 3,851,487,247.41
5. Step 5: Solve for x
   x = 3,851,487,247.41/91,300.14
6. Step 6: Final answer
   x = 42,184.90