Finding the Third Proportional to 420,307.50 and 912,060

Step by Step Solution

1. Step 1: Write the proportion equation
   420,307.50 : 912,060 = 912,060 : x
2. Step 2: Convert to fraction form
   420,307.50/912,060 = 912,060/x
3. Step 3: Cross multiply
   420,307.50x = 912,060 × 912,060
4. Step 4: Simplify right side
   420,307.50x = 831,853,443,600
5. Step 5: Solve for x
   x = 831,853,443,600/420,307.50
6. Step 6: Final answer
   x = 1,979,154.41