Finding the Fourth Proportional to 12,960,061.10, 19,402,766.85 and 12,586,813.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960,061.10 : 19,402,766.85 = 12,586,813.10 : x
2. Step 2: Convert to fraction form
   12,960,061.10/19,402,766.85 = 12,586,813.10/x
3. Step 3: Cross multiply
   12,960,061.10x = 19,402,766.85 × 12,586,813.10
4. Step 4: Simplify right side
   12,960,061.10x = 244,218,999,963,825.75
5. Step 5: Solve for x
   x = 244,218,999,963,825.75/12,960,061.10
6. Step 6: Final answer
   x = 18,843,969.80