Finding the Fourth Proportional to 91,111.80, 136,619.10 and 38,461.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,111.80 : 136,619.10 = 38,461.80 : x
2. Step 2: Convert to fraction form
   91,111.80/136,619.10 = 38,461.80/x
3. Step 3: Cross multiply
   91,111.80x = 136,619.10 × 38,461.80
4. Step 4: Simplify right side
   91,111.80x = 5,254,616,500.38
5. Step 5: Solve for x
   x = 5,254,616,500.38/91,111.80
6. Step 6: Final answer
   x = 57,672.18