Finding the Fourth Proportional to 112,401.16, 155,111.80 and 61,412.80

Step by Step Solution

1. Step 1: Write the proportion equation
   112,401.16 : 155,111.80 = 61,412.80 : x
2. Step 2: Convert to fraction form
   112,401.16/155,111.80 = 61,412.80/x
3. Step 3: Cross multiply
   112,401.16x = 155,111.80 × 61,412.80
4. Step 4: Simplify right side
   112,401.16x = 9,525,849,951.04
5. Step 5: Solve for x
   x = 9,525,849,951.04/112,401.16
6. Step 6: Final answer
   x = 84,748.68