Finding the Fourth Proportional to 85,075.71, 127,692.51 and 42,985.35

Step by Step Solution

1. Step 1: Write the proportion equation
   85,075.71 : 127,692.51 = 42,985.35 : x
2. Step 2: Convert to fraction form
   85,075.71/127,692.51 = 42,985.35/x
3. Step 3: Cross multiply
   85,075.71x = 127,692.51 × 42,985.35
4. Step 4: Simplify right side
   85,075.71x = 5,488,907,234.73
5. Step 5: Solve for x
   x = 5,488,907,234.73/85,075.71
6. Step 6: Final answer
   x = 64,517.91