Finding the Fourth Proportional to 91,590.46, 137,405.41 and 28,409.31

Step by Step Solution

1. Step 1: Write the proportion equation
   91,590.46 : 137,405.41 = 28,409.31 : x
2. Step 2: Convert to fraction form
   91,590.46/137,405.41 = 28,409.31/x
3. Step 3: Cross multiply
   91,590.46x = 137,405.41 × 28,409.31
4. Step 4: Simplify right side
   91,590.46x = 3,903,592,817.34
5. Step 5: Solve for x
   x = 3,903,592,817.34/91,590.46
6. Step 6: Final answer
   x = 42,620.08