Finding the Fourth Proportional to 42,768,283.70, 64,152,425.55 and 42,390,370.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,768,283.70 : 64,152,425.55 = 42,390,370.10 : x
2. Step 2: Convert to fraction form
   42,768,283.70/64,152,425.55 = 42,390,370.10/x
3. Step 3: Cross multiply
   42,768,283.70x = 64,152,425.55 × 42,390,370.10
4. Step 4: Simplify right side
   42,768,283.70x = 2,719,445,061,877,196
5. Step 5: Solve for x
   x = 2,719,445,061,877,196/42,768,283.70
6. Step 6: Final answer
   x = 63,585,555.15