Finding the Fourth Proportional to 91,671, 137,506.61 and 25,111.70

Step by Step Solution

1. Step 1: Write the proportion equation
   91,671 : 137,506.61 = 25,111.70 : x
2. Step 2: Convert to fraction form
   91,671/137,506.61 = 25,111.70/x
3. Step 3: Cross multiply
   91,671x = 137,506.61 × 25,111.70
4. Step 4: Simplify right side
   91,671x = 3,453,024,738.34
5. Step 5: Solve for x
   x = 3,453,024,738.34/91,671
6. Step 6: Final answer
   x = 37,667.58