Finding the Fourth Proportional to 42,005,322.45, 63,017,237.76 and 12,859,381.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,005,322.45 : 63,017,237.76 = 12,859,381.90 : x
2. Step 2: Convert to fraction form
   42,005,322.45/63,017,237.76 = 12,859,381.90/x
3. Step 3: Cross multiply
   42,005,322.45x = 63,017,237.76 × 12,859,381.90
4. Step 4: Simplify right side
   42,005,322.45x = 810,362,726,323,854.25
5. Step 5: Solve for x
   x = 810,362,726,323,854.25/42,005,322.45
6. Step 6: Final answer
   x = 19,291,905.86