Finding the Fourth Proportional to 112,401.28, 155,111.94 and 61,412.90

Step by Step Solution

1. Step 1: Write the proportion equation
   112,401.28 : 155,111.94 = 61,412.90 : x
2. Step 2: Convert to fraction form
   112,401.28/155,111.94 = 61,412.90/x
3. Step 3: Cross multiply
   112,401.28x = 155,111.94 × 61,412.90
4. Step 4: Simplify right side
   112,401.28x = 9,525,874,060.03
5. Step 5: Solve for x
   x = 9,525,874,060.03/112,401.28
6. Step 6: Final answer
   x = 84,748.80