Finding the Fourth Proportional to 61,319, 92,388.25 and 55,402.76

Step by Step Solution

1. Step 1: Write the proportion equation
   61,319 : 92,388.25 = 55,402.76 : x
2. Step 2: Convert to fraction form
   61,319/92,388.25 = 55,402.76/x
3. Step 3: Cross multiply
   61,319x = 92,388.25 × 55,402.76
4. Step 4: Simplify right side
   61,319x = 5,118,563,764.56
5. Step 5: Solve for x
   x = 5,118,563,764.56/61,319
6. Step 6: Final answer
   x = 83,474.35