Finding the Fourth Proportional to 91,810.10, 137,747.55 and 88,570.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,810.10 : 137,747.55 = 88,570.10 : x
2. Step 2: Convert to fraction form
   91,810.10/137,747.55 = 88,570.10/x
3. Step 3: Cross multiply
   91,810.10x = 137,747.55 × 88,570.10
4. Step 4: Simplify right side
   91,810.10x = 12,200,314,278.26
5. Step 5: Solve for x
   x = 12,200,314,278.26/91,810.10
6. Step 6: Final answer
   x = 132,886.41