Finding the Fourth Proportional to 42,964,307.76, 64,401,338.52 and 21,074,377.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964,307.76 : 64,401,338.52 = 21,074,377.37 : x
2. Step 2: Convert to fraction form
   42,964,307.76/64,401,338.52 = 21,074,377.37/x
3. Step 3: Cross multiply
   42,964,307.76x = 64,401,338.52 × 21,074,377.37
4. Step 4: Simplify right side
   42,964,307.76x = 1,357,218,110,781,590.50
5. Step 5: Solve for x
   x = 1,357,218,110,781,590.50/42,964,307.76
6. Step 6: Final answer
   x = 31,589,432.75