Finding the Fourth Proportional to 76,545.25, 105,633.01 and 42,090.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,545.25 : 105,633.01 = 42,090.59 : x
2. Step 2: Convert to fraction form
   76,545.25/105,633.01 = 42,090.59/x
3. Step 3: Cross multiply
   76,545.25x = 105,633.01 × 42,090.59
4. Step 4: Simplify right side
   76,545.25x = 4,446,155,436.89
5. Step 5: Solve for x
   x = 4,446,155,436.89/76,545.25
6. Step 6: Final answer
   x = 58,085.32