Finding the Fourth Proportional to 105,557.52, 158,085 and 61,090.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,557.52 : 158,085 = 61,090.56 : x
2. Step 2: Convert to fraction form
   105,557.52/158,085 = 61,090.56/x
3. Step 3: Cross multiply
   105,557.52x = 158,085 × 61,090.56
4. Step 4: Simplify right side
   105,557.52x = 9,657,501,177.60
5. Step 5: Solve for x
   x = 9,657,501,177.60/105,557.52
6. Step 6: Final answer
   x = 91,490.41