Finding the Fourth Proportional to 91,061.12, 136,590.40 and 28,731.04

Step by Step Solution

1. Step 1: Write the proportion equation
   91,061.12 : 136,590.40 = 28,731.04 : x
2. Step 2: Convert to fraction form
   91,061.12/136,590.40 = 28,731.04/x
3. Step 3: Cross multiply
   91,061.12x = 136,590.40 × 28,731.04
4. Step 4: Simplify right side
   91,061.12x = 3,924,384,246.02
5. Step 5: Solve for x
   x = 3,924,384,246.02/91,061.12
6. Step 6: Final answer
   x = 43,096.16