Finding the Fourth Proportional to 55,590.21, 83,385.14 and 42,958.31

Step by Step Solution

1. Step 1: Write the proportion equation
   55,590.21 : 83,385.14 = 42,958.31 : x
2. Step 2: Convert to fraction form
   55,590.21/83,385.14 = 42,958.31/x
3. Step 3: Cross multiply
   55,590.21x = 83,385.14 × 42,958.31
4. Step 4: Simplify right side
   55,590.21x = 3,582,084,061.80
5. Step 5: Solve for x
   x = 3,582,084,061.80/55,590.21
6. Step 6: Final answer
   x = 64,437.32