Finding the Fourth Proportional to 61,938.18, 85,427.60 and 42,849.72

Step by Step Solution

1. Step 1: Write the proportion equation
   61,938.18 : 85,427.60 = 42,849.72 : x
2. Step 2: Convert to fraction form
   61,938.18/85,427.60 = 42,849.72/x
3. Step 3: Cross multiply
   61,938.18x = 85,427.60 × 42,849.72
4. Step 4: Simplify right side
   61,938.18x = 3,660,548,526.02
5. Step 5: Solve for x
   x = 3,660,548,526.02/61,938.18
6. Step 6: Final answer
   x = 59,100.03