Finding the Third Proportional to 64,621.13 and 91,897.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,621.13 : 91,897.88 = 91,897.88 : x
2. Step 2: Convert to fraction form
   64,621.13/91,897.88 = 91,897.88/x
3. Step 3: Cross multiply
   64,621.13x = 91,897.88 × 91,897.88
4. Step 4: Simplify right side
   64,621.13x = 8,445,219,429.52
5. Step 5: Solve for x
   x = 8,445,219,429.52/64,621.13
6. Step 6: Final answer
   x = 130,688.21