Finding the Fourth Proportional to 62,139.07, 85,722.60 and 42,002.98

Step by Step Solution

1. Step 1: Write the proportion equation
   62,139.07 : 85,722.60 = 42,002.98 : x
2. Step 2: Convert to fraction form
   62,139.07/85,722.60 = 42,002.98/x
3. Step 3: Cross multiply
   62,139.07x = 85,722.60 × 42,002.98
4. Step 4: Simplify right side
   62,139.07x = 3,600,604,653.35
5. Step 5: Solve for x
   x = 3,600,604,653.35/62,139.07
6. Step 6: Final answer
   x = 57,944.30