Finding the Fourth Proportional to 61,320.50, 92,390.50 and 55,404.26

Step by Step Solution

1. Step 1: Write the proportion equation
   61,320.50 : 92,390.50 = 55,404.26 : x
2. Step 2: Convert to fraction form
   61,320.50/92,390.50 = 55,404.26/x
3. Step 3: Cross multiply
   61,320.50x = 92,390.50 × 55,404.26
4. Step 4: Simplify right side
   61,320.50x = 5,118,827,283.53
5. Step 5: Solve for x
   x = 5,118,827,283.53/61,320.50
6. Step 6: Final answer
   x = 83,476.61