Finding the Fourth Proportional to 139,745,760.48, 209,656,376.10 and 42,698,816.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,745,760.48 : 209,656,376.10 = 42,698,816.28 : x
2. Step 2: Convert to fraction form
   139,745,760.48/209,656,376.10 = 42,698,816.28/x
3. Step 3: Cross multiply
   139,745,760.48x = 209,656,376.10 × 42,698,816.28
4. Step 4: Simplify right side
   139,745,760.48x = 8,952,079,085,024,483
5. Step 5: Solve for x
   x = 8,952,079,085,024,483/139,745,760.48
6. Step 6: Final answer
   x = 64,059,754.33