Finding the Third Proportional to 56,154 and 85,140

Step by Step Solution

1. Step 1: Write the proportion equation
   56,154 : 85,140 = 85,140 : x
2. Step 2: Convert to fraction form
   56,154/85,140 = 85,140/x
3. Step 3: Cross multiply
   56,154x = 85,140 × 85,140
4. Step 4: Simplify right side
   56,154x = 7,248,819,600
5. Step 5: Solve for x
   x = 7,248,819,600/56,154
6. Step 6: Final answer
   x = 129,088.21