Finding the Fourth Proportional to 55,384.19, 83,081.42 and 42,918.15

Step by Step Solution

1. Step 1: Write the proportion equation
   55,384.19 : 83,081.42 = 42,918.15 : x
2. Step 2: Convert to fraction form
   55,384.19/83,081.42 = 42,918.15/x
3. Step 3: Cross multiply
   55,384.19x = 83,081.42 × 42,918.15
4. Step 4: Simplify right side
   55,384.19x = 3,565,700,631.18
5. Step 5: Solve for x
   x = 3,565,700,631.18/55,384.19
6. Step 6: Final answer
   x = 64,381.21