Finding the Fourth Proportional to 12,920,950.56, 19,356,587.76 and 7,223,897.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920,950.56 : 19,356,587.76 = 7,223,897.76 : x
2. Step 2: Convert to fraction form
   12,920,950.56/19,356,587.76 = 7,223,897.76/x
3. Step 3: Cross multiply
   12,920,950.56x = 19,356,587.76 × 7,223,897.76
4. Step 4: Simplify right side
   12,920,950.56x = 139,830,010,960,707.42
5. Step 5: Solve for x
   x = 139,830,010,960,707.42/12,920,950.56
6. Step 6: Final answer
   x = 10,821,960.06