Finding the Fourth Proportional to 112,061.40, 167,861.70 and 77,040.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,061.40 : 167,861.70 = 77,040.60 : x
2. Step 2: Convert to fraction form
   112,061.40/167,861.70 = 77,040.60/x
3. Step 3: Cross multiply
   112,061.40x = 167,861.70 × 77,040.60
4. Step 4: Simplify right side
   112,061.40x = 12,932,166,085.02
5. Step 5: Solve for x
   x = 12,932,166,085.02/112,061.40
6. Step 6: Final answer
   x = 115,402.50