Finding the Fourth Proportional to 91,585.32, 137,397.63 and 28,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,585.32 : 137,397.63 = 28,404.10 : x
2. Step 2: Convert to fraction form
   91,585.32/137,397.63 = 28,404.10/x
3. Step 3: Cross multiply
   91,585.32x = 137,397.63 × 28,404.10
4. Step 4: Simplify right side
   91,585.32x = 3,902,656,300.55
5. Step 5: Solve for x
   x = 3,902,656,300.55/91,585.32
6. Step 6: Final answer
   x = 42,612.25