Finding the Third Proportional to 42,071.63 and 64,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,071.63 : 64,687.50 = 64,687.50 : x
2. Step 2: Convert to fraction form
   42,071.63/64,687.50 = 64,687.50/x
3. Step 3: Cross multiply
   42,071.63x = 64,687.50 × 64,687.50
4. Step 4: Simplify right side
   42,071.63x = 4,184,472,656.25
5. Step 5: Solve for x
   x = 4,184,472,656.25/42,071.63
6. Step 6: Final answer
   x = 99,460.69