Finding the Fourth Proportional to 112,692.16, 155,514.72 and 61,705.12

Step by Step Solution

1. Step 1: Write the proportion equation
   112,692.16 : 155,514.72 = 61,705.12 : x
2. Step 2: Convert to fraction form
   112,692.16/155,514.72 = 61,705.12/x
3. Step 3: Cross multiply
   112,692.16x = 155,514.72 × 61,705.12
4. Step 4: Simplify right side
   112,692.16x = 9,596,054,459.37
5. Step 5: Solve for x
   x = 9,596,054,459.37/112,692.16
6. Step 6: Final answer
   x = 85,152.81