Finding the Third Proportional to 56,688 and 88,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,688 : 88,478.50 = 88,478.50 : x
2. Step 2: Convert to fraction form
   56,688/88,478.50 = 88,478.50/x
3. Step 3: Cross multiply
   56,688x = 88,478.50 × 88,478.50
4. Step 4: Simplify right side
   56,688x = 7,828,444,962.25
5. Step 5: Solve for x
   x = 7,828,444,962.25/56,688
6. Step 6: Final answer
   x = 138,097.04