Finding the Third Proportional to 56,739,680 and 89,859,680

Step by Step Solution

1. Step 1: Write the proportion equation
   56,739,680 : 89,859,680 = 89,859,680 : x
2. Step 2: Convert to fraction form
   56,739,680/89,859,680 = 89,859,680/x
3. Step 3: Cross multiply
   56,739,680x = 89,859,680 × 89,859,680
4. Step 4: Simplify right side
   56,739,680x = 8,074,762,089,702,400
5. Step 5: Solve for x
   x = 8,074,762,089,702,400/56,739,680
6. Step 6: Final answer
   x = 142,312,436.19